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How Many Miles Per Gallon Does Your Motorhome Get?

by Jan
(Yelm, WA)

Hi,

I asked a while ago about what motorhomes get the best mpg. Now I am trying again to get more specific information.

Can people just please reply to this post with what kind of motorhome, length, motor, tranny & their mpg? As much detail as you want to give.

Please & thanks,

OK Jan your wish is my command. If anyone reading this would like to share the information on how many miles per gallon their Motorhome gets they can add the information by clicking on the "Click Here To Post Comments" link located near the bottom of this page.

Please feel free to also tell us any tips and tricks you use to increase your motorhomes fuel mileage.

Leave your RV repair bills to us—Good Sam Extended Service Plan
Happy RVing

RVing Al

P.S. Did You Know that you can build your own Web Page on Everything About RVing? Just Tell Us Why You Love RVing, Tell Us About Your Favorite Camping Or RVing Destination or Share a Funny RVing Story With Us.

Comments for How Many Miles Per Gallon Does Your Motorhome Get?

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Rating

Mileage
by: Rob

Just finished a 16,650 km two month trip across Canada. Ford E450 6.8L 24’ Leprechaun. Lowest 8.5 - 100-110 kph facing a brisk wind on a rainy day. Highest 12.6 - 60-80 kph on PEI. OVERALL cost - approx. $.50/km. No complaints. That 6.8 is a beast uphill/downhill/against the wind etc. Can keep up to traffic flow under any conditions!

Rating

RV gas mileage
by: Charlie

2002 Volkswagen\Winnebago Vista 21b Class C
Motorhome. 25',no slides,front wheel drive,4
wheel, passenger car tires, 7,800# empty weight.
2.8 liter regulator gas fuel injected VR-6
201 horsepower with a 4-speed auto tranny.
Pulls great but downshifts into passing on hills.
*** 8.5 - 14 miles per gallon ***
How I maximize mpg: Turn off cruise; keep it around 55-60 MPH; Travel light; Let it slow down going up hills; Don't tow; Upgrade to a higher
fuel octane. This rig is based on the VW Eurovan, which is rated for 17 MPG on the highway.
Overall: I like it a lot. I'm a VW guy!! It has the ability to run 70+ MPH, but sucks gas doing so. Comfortable and roomy. Big bathroom with separate shower. Suits our needs. Con:Gas mileage.

Rating

crappy
by: Anonymous

1994 29 ft class c with ford 460.
8 mpg if you keep it under 60. 6 mpg over 60.
It has under 50000 miles and runs great.
sold it because of the poor mpg.

Rating

82 ford brougham class c loaded
by: Anonymous

My 1982 ford brougham class c with 2 gas tanks full,fresh water tank full and half grey and half on the holding tanks with all my tools loaded gets 12.5mpg on highway speeds from 55 to 70mph and no traffic in 405s socal

Rating

fuel mileage
by: Ken

we have a 92 Itasca w 5.9 Cummins. auto if drive 50-55 it gets 12-14 mpg .

Rating

Economy RV
by: Anonymous

1990 Dodge D250 with a 5.9 Liter Cummins Diesel and a 5 speed manual. This has a 10ft. Alaskan camper = 17 MPG at 600 MPH.

Rating

Forest River MBS 24 ft
by: Anonymous

2017 V6 turbo diesel purchased new, first 20,000 miles 12-13 MPG, now getting 13-15 depending on speed more so than hills. Fuel costs and service are higher plus DEF fluid. I'm guessing a gas powered rig getting a couple miles less per gallon would run about the same costs per mile but I love the torque going up hills without effort or loss of speed. Mercedes offers 100K drive train warrantee which rocks! Have 8,000 mile trip coming up this summer and expect millage to improve as we get closer to 50K miles. The sprinter series are bullet proof and average 14-15 MPG on rigs under 25 ft long.

Rating

Mirada 32ss
by: Earl R

We just bought a 2020 Mirada 32ss with a v10. It gets 8mpg over 600 miles per tank fill. I love the layout but I do wish they offered the power stroke diesel as an engine option for the extra torque when towing a toad.

Rating

Mercedes Benz sprinter MPG
by: L.B.

I purchased a thor freedom elite 24fe with a 2019 Mercedes Benz sprinter and I did 13.4 mpg at 65 mph in 7 hours and 455 miles.

The motorhome had 1800 miles and a strong wind 15mph the handling his good with side wind.

For a brand new 13.4 mpg is pretty good.

Rating

MPG of Motorhomes
by: James

I did own a Ford 4 Stroke Diesel 1998 22' Chinook RV. I drove 68 MPH on the road. It would get 14-15 MPG. Another RV I owned called a 1985 26' Jamboree, had a 460 that got 8 MPH without the overdrive someone added, and 10 with the O/D.

Rating

2010 Forest River Sunseeker 3120DS
by: Mike

Class C has V10 and gets between 8 and 10 MPG pending load, speed, and driving conditions.

Rating

2019 Forest River sunseeker MPG
by: frank.haas

We have a Ford V10 in this unit we averaged six miles per gallon. That includes mountain driving on the plains driving all averages out to 6 miles per gallon.

Rating

2009 great west vans titan class B
by: jjustj

6-liter chevy with 26k only been on 1 road trip so far. 65mph average 12-14 mpg little or no headwind.

Rating

2001 Safari Trek
by: Traveling Man

2001 Safari Trek, model 2830 and it has the 7.4 l Vortec engine. 290 horsepower at 4000 RPM and 410 foot pounds at 3200 RPM. I rarely if ever get above 2000 RPM and that's where my fuel economy lies. I prefer to keep it under 65 miles an hour, preferably 55 that's where I get about 12 to 13 miles to the gallon.

My Trek is 29 foot 3 in from bumper to bumper and I love every inch of it! It is built like a tank and drives like a dream. I have yet to see anything new on the market that I would consider as a replacement. The only thing that could possibly entice me would be something with a tag axle and it would have to be of the same quality as the Trek.

Rating

1998 34J Pace Arrow
by: ParrJ.

The Best we could get was 7Mpg. 454cu.in. The ride was great, Great Class A RV Home.

Rating

Question
by: Anonymous C

The page is great I have a question for the Anonymous that has the 1983 Ford Brougham Motor Home I also have one same year that I have been trying to bring back to life I have put all new parts on it but I am having problems, the carbutor is it a Holly 2 barrel or a 4 Barrel it had none in it and I have tried a brand new 2 barrel but it wont pull it will start but no pep to pull it out in gear. I would be so greatfull if you could look at yours and tell me what one is in it please.I want to travel cross County and till it is fixed I am stuck here.

Rating

Gas millage and power up the hills
by: Bryan

We have 2002 Winnebago Minnie 31 ft 6.8 liter v 10.get 9 miles per gallon loaded.Will be installing Banks performance kit headers exhaust system trans chip, engine chip and intake kit. Heading to NWT this summer will let you know how millage performance is ???onside

Rating

Fuel mileage
by: James

1994 28' Safari Trek with 3.9 Isuzu Diesel gets 12 MPG towing Ford Escape and 15 MPG on level highway. 60 or less is my driving speed.

Rating

2014 Winnebago Trend 23L, 12-14 mpg
by: DaveDUtah

Trend 23L has a 3.6L Pentastar v6 (gas) with 6 speed transmission.

Gets about 12 mpg going 75-80 mph on the interstate.

Gets 14.5 mpg doing 60-65 mph on scenic byways.

Rating

2005 Chinook Glacier MPG
by: Anonymous

Just finished a 3,500 mi trip from Monterey, CA to Grand Teton, Yellowstone, Glacier and Olympic National Park then home.

2005 Chinook Glacier 2500LE, V10, 13,500 lbs - no tow car. Averaged 9.1 mpg. (9.8 hi and 8.5 low)

Cruising most of the time around 67 mph.

We previously owned a 2000 Chinook Concourse w/V10 and got between 10-13 mpg

Rating

973 Winnebago
by: Sean

Just finished a trip through the Adirondacks. 1973, 18ft Winnie with a Dodge 318.....averaged 8.2mpg

Rating

MPG
by: Anonymous

25 ft class C ford chassis 460 C.I. injected Gas I get 8.9 MPG LIGHT LOADED. I GET I.9 LOADED PULLING AN 18 FT TRAILER FULL OF QUADS AND MINING GEAR. DOESN'T MATTER What weight the 460 is pulling.

Rating

150k mile 83 brougham 22 gas mileage
by: Anonymous

I have an 83 brougham 22' with a 460 auto with a gear vendors over/underdrivecunderdrive currently has 14 150k miles on it i get 7.8mpg at 65mph when i use cruise and keep a steady 55 i can get 9mpg guess thats not too bad as im living in it and its fully loaded i was hoping for better with the gv overdrive. I am thinking of going to a 28 to 30 class a mileage. Wont be much different. I travel for work and it sure is nice to always have your house with you.

Rating

MPG
by: Scott.S

I have a 99 37' pace arrow with V10 with a light foot i will get around 9 mpg heavy around 8 mpg with a toed light foot around 7 heavy around 5 to 6 mpg but never got anything above 9 mpg.

Rating

Fuel mileage '08, 40' Holiday Rambler Endeaver
by: Dennis

I have a 2008, 40' Holiday Rambler Endeaver, with a 400 Cummins. I normally tow a 2012 Chev Equinox on a Tow Dolly. I will get 8 mpg pretty consistantly, and doesn't matter whether I am Towing or not.

Rating

2006 Fiesta 26 LPG
by: Kevin

2006 workhorse 26y 8.1 L , 15,000GVW , no tow car , have a 600 LB motorcycle platform on the rear ..

Driving through North America down to Panama and back down to Costa Rica I average 9 mpg on regular unleaded .. running on LPG She averages 7 MPG ...

Rating

fuel millage
by: Anonymous

i have 2002 30 ft class a coachman v10 through the mountain and flat combined i can get a solid 9 mpg
canadian

Rating

90 Itasca 27RT Sunflyer
by: Crabby

My Itasca has a carbureted series 4 454 3-speed automatic. If we carry water and full of fuel traveling Montana we make between six and eight miles to gallon. Empty no water or sewer we make between 8 and 10 miles to the gallon. Motorhome fully loaded at all times with a boatload of camping stuff.

Rating

2009 Fleetwood Icon
by: Russ

88,580 miles on our Icon (Sprinter) average 15.9 MPG. We live in Colorado and see a lot of mountains.

Rating

1993 Toyota Itasca Spirit
by: Anonymous

21' V6 12.5 mpg to 16 mpg. Averages about 13.5 with combination of level and hilly terrain going 60mph.I5 Oregon/Washington hwy driving.

Rating

1983 Revcon
by: Dan Baxley

Update to a previous posting: 12,000 miles later in newly rebuilt 454 Chevy engine. MH is 28-30' Revcon, front wheel drive, 12-15,000 GVW. Started out getting 5.5 MPG average traveling from Northern California to Oregon and Oregon Coast -- lots of mountains, on around and in between. After initial break-in it went up to 6.5 mpg. Now, after several thousands miles we have never been able to 8 mpg, averaging 7.8 MPG. What is confusing is that the old engine, same MH, was averaging 9.4 MPG and we had gotten 11 on a better trip, so what gives? I believe it is the cheaper, bad gas they are selling us. Spiking real gas with Alcohol. Another person getting 3-4 MPG better with their Toyota in their first 100,000 miles than in their last 40,000 miles. I don't think it is the engines that are changing but the stupid gas they are selling us.

Rating

2002 trail Lite
by: Art

Trail. Lite 211 5.7 chev 12.5 mpg

Rating

2018 Freedom Elite
by: Anonymous

I just purchased a 2018 Ford 350 Freedom Elite 24 ft
Motorhome. It has a V 10 engine with a six speed transmission. I've put about 4000 miles on it and at 63-65 Mph I get 8-8.5 mpg. Pulling a 6X8 trailer in tow haul mode I got 8.3 mpg so basically no difference. The engine runs about 2400rpm @ 63 mph which I believe is too high. The engine rpm in tow haul mode was the same. Ford says this is normal fuel economy and normal rpm. I disagree because I had a 99 winnebago Spirit 31 ft with the same engine and four speed transmission and I would get 9-10 mpg at 65-70 mph. Where do you go to get the facts?

Rating

Ford rv 350 v8 mpg 180hp (underpowered)
by: TIM.

I have a 1992 ford rv 350 which is 24ft long and has the ford 7.3 diesel v8 fitted with auto trans. AAs fuel in the Uk is taxed by the government at 95 percent and 1 litre 1000ml of fuel costs 1 pounds 25 pence per litre yes per 1000ml i wince at 13mpg even with the generator removed for lightness living in the Uk is pretty hard work because if the government screwing every penny out of the British Public it virtually bankrupts me everytime i start the engine. Enough said.

Rating

MPG of RV 40wds2 Holiday Rambler 450hp 1997
by: Anonymous

Hello, I have a 1997 40' Holiday Rambler Navigator with a single rear axle. It has a Cummins M11 red top rated at 450 HP. There is no EGR and it does have a computer so it is a celect. Has a six speed 4020 Allison heavy duty trans. I'm not sure of the final gear but it will scare you on an open road. Talking 95+ and wasn't at max revs and showed no disposition to not get to full governed rpm. I just didn't feel it was worth the risk as the semi who decided not to let me pass was not up to the task... In any event I drive around 67 - 68 mph in low side of power band and get 9.5 miles per gallon without the generator and all water/holding tanks empty. With generator running both a/c units on and the wife cooking it looses about 1 mpg. Happens a lot here in Fl. which is mostly flat. We have checked this on three diferent occasions as people don't believe it. Had us double checking our math !!! Each time it comes out the same. Tire pressures set at max. 110 fronts 105 rears cold. They Are 195/75-22.5 on aluminum Alcoa wheels. Fully loaded this unit tops out at 42500 lbs. I put it on the scales and hjow I travel is 38,200ish. Hope this helps.

Rating

2006 Allegro open road 31 ft 6.5-7MPG
by: Anonymous

I have a V8 Chevy on the workhorse chassis and the Allison 6 speed transmission. I tow a 4WD Jeep Liberty and, unless the views are scenic, I cruise at 65 to 70 mph, downshift and increase the RPM as I start up hills to keep my speed up as much as possible. I pass way more trucks, RV's and of course motorcycles than pass me. I also live in the west so every trip includes traveling over mountains. With that said you can see why I've only gotten 6.5 - 7 MPG average on each tank of gas over the last 20,000 miles. Yes I could save $20 on gas and take an extra couple of hours to get where I'm going but my time off the road is much more valuable to me than the cost of the gas.

Rating

BIG BLOCK V-8, V-10
by: Anonymous

My experience is you will get between 6 mpg and 12 mpg. All depending on size of rig, weight, towing, hill country, ect... i think for the big blocks you can expect around 9 mpg average, and that's factoring all the unknown's in a trip.

Rating

1993 Toyota class C 3.0 V6
by: Anonymous

Two trips California to Michigan touring small motorcycle trailer and no water on board 13 MPG. Low 8-10 high 13-16.

Rating

2017 ITASCA 24G
by: Anonymous

8500 miles. North Dakota to Washington to southern California to Florida. One trip from North Dakota to Iowa. Cumulative mileage 17.3387. Worst tank mileage 13.75995. Best tank mileage 20.72264.

Mercedes chassis. Diesel engine and generator with about ten hours put on the generator.

55 MPH, occasional 60MPH.

Rating

MPG
by: RESLBS

2005 FOREST RIVER 34L V10 7.6 MPG AVERAGE OVER 5000 MILE TRIP

Rating

1988 Toyota Dolphin RV
by: 1988 toyota dolphin

My 21 foot 1988 Toyota Dolphin RV averages 13.4 on the Seattle to sacramento route on I5.

Rating

1985 26 ft Coachman. Ford 460, 4 bbl carb, C-6 three speed tranny
by: Chris

Keep a religious log book since we bought her 5 years ago.
7-8ish mpg
Sometimes 6ish sometimes 9ish.
Took her for a service once to Bar Harbor Maine from Calais Maine, down the "airline" (Route 9) empty, gas in the front 22 gallon tank only and pulled 11ish.
One thing I always tell folks. You don't buy an RV for it's fuel economy. If you do you will either be disappointed or lying (or both) fairly soon. :)

Rating

Wanna be snowbird
by: Anonymous

Hey fellow travelers, I have a 1997 holiday rambler le with bogey axle 460 ford Motor cursing at 70 miles an hour I get an average mpg of 6.5 that's from Maryland to florida some days better and dome days worse ,no toad.happy travels

Rating

1996 Southwind
by: Tadd

96 Southwind, 37ft, tag axle, 75 gal fuel, Ford 460 with banks power pack (headers, 3 inch exhaust, trans command, intake), US Gears dual range auxiliary transmission, 18,000 lbs, no toad. Las Vegas, NV to Oceanside, CA and back 6.6 mpg. Used low range through mountains ( 3,000 rpm at 60 mph) and ran Onan 5k generator the entire trip (plus through one night). 96k original miles on the 460 and a recently rebuilt trans.

Rating

Miles Per Galon
by: Anonymous

Motor Home Leprechaun C Class 2014, size 27" foot.
I get an average 7,2 miles per gallon.

Rating

Class B Ford 460
by: Jakk Wylde

1979 Diamond G.T. E370 chassis with a fresh ported 460.. 13.2 mpg

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RV Fuel milage
by: Dick/ navret

2004 Damon Escaper, 40 ft,Cummins 400diesel pusher, Allison trans 6.5 to 8 mpg doesn't seem to matter speed 50 to 65 towing a ford escaper.

Rating

1991 toyota winnebayo
by: Anonymous

1991 toyota spirit winnebayo - 21 feet -6,000 lbs auto -3.0 liter V6 -9 to 10 mpg

Rating

6.5 - 9 mpg
by: Anonymous

Gas powered 2008 Fleetwoid Bounder 35h with Workhorse chassis.
I get around 6.5 - 8 mpg when towing my 2016 Honda HRV.
When I'm not towing the car, I get between 7 - 9 mpg.
I drive hard and fast and would probably get better mpg if I let up a little.
When traveling, I put a fuel conditioner and injector cleaner in the tank, and I also replace 1 qt. of oil with 1 qt. of Duralube oil treatment which makes a HUGE difference in my milage.
Considering that my rig is rated to get between 5 - 6 mpg, I'm thrilled!

Rating

Mpg
by: Edward

I have a suncrest ford 350 diesel 6.9 just done a round trip to UK from malaga Spain, where l have lived for the last 19 years. Get about 17 mpg. It seems to do better when Driven hard. I also put a stait thru exhaust system on last year. Seems to help.sounds good too. Not the fastest rv on the planet, but love it. End.

Rating

Nissan Sunrader. 17-21mpg
by: KEN R

1984 Nissan Sunrader with a 2.4 motor and 5 spd manual. Stock equip...fully loaded I get 21mpg on freeway type driving and 17 around town.

Rating

Fuel consumption
by: Anonymous

27 ft Southwind with 10 gal water and only 100lt of fuel (26 us gal) riving at 60 mph I get 9 mpg. at 75 mph I get 8.5. Full of water and 52 gallons of gas I get 7 mpg.
Bil

Rating

It May Not Be A Class A
by: Bill

Enjoyed reading the reports and found a couple for tow vehicles so I thought someone might find this entertaining. 1999 Jeep Cherokee, 4.0L inline 6, tow package (4.11 dif, 3spd/OD automatic), 4X4, and using synthetic oils in engine, transmission, differentials, and transfer case.

I have pulled a Jayco SO14 camper weighing 3000 pounds from Phoenix, AZ to Walker, MN 12 times since 2003 (a total of 41,640+ miles). This trip has almost always been at GCWR with a lot of 3 speed transmission use (no OD) in the mountains and hills, AC usage, and the usual slows and stops of 55 to 65 MPH secondary highways.

Using both the onboard computer and manual fuel/distance computation the Jeep has consistently averaged 14.1 MPG over the years.

Rating

Revcon, 28 footer, front wheel drive
by: Dan

1983 Revcon, with 454 Chevy, rebuilt motor. I get 7.5 on the average in a lot of mountain coast driving. Just do not seem to be able to squeeze any more out. The gases mixed with ethanol, you know, corn whisky, is the worst and may be the reason I don't get much better, as I travel a lot in Oregon -- beautiful state, worst politics ever.

Rating

The Best V-8 Class C = 15 to 16mpg
by: Anonymous

look at the 1982 winnebago warrior model wc723rh. only 6,000lbs weight and 4 tires on the road. so happy with mine.

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Vintage gas hog...not too bad
by: King

Had a 1975 American Clipper Class C, with a Dodge 360, and a 727 tranny. Edelbrock 4bl, flowmasters, a home-made ram-air system.
These were overloaded out of the factory. I rolled around at about 10,700lbs "wet" and loaded with gear......too heavy...oh well.....luckily I drive slow.
Best I did was a midnight run down Hwy 5 to LA from Santa Cruz, CA. Had a tail wind, and drove 52mph, and got 10.2mpg on that leg.
Typically got 8.5 to 9.
Prior to switching to Edelbrok, the old Carter 2bl gave me 7.5mpg.
BTW, that Clipper did NOT like going 65mph..........fine by me........it didn't fele right at that speed

Rating

dodge 80 brougham dodge mpg
by: Jerry

Hi, I have an 80 Brougham dodge camper van (21ft) that I may buy. It has a 360 dodge engine. wondering about what kind of mpg I might get. Anyone know? thanks, Jerry

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good power.
by: Anonymous

1987 39.5 ft at aconstsnt 75 MPH powered by a 460 ford I get 6.5 MPG.

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help with mileage
by: Anonymous

2012 coachman 29ft v10 engine 9 miles to gal

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bla bla bla
by: Anonymous

1993 Toyota motorhome 140,000 miles 3.0v6 with 4 speed auto tranny. 6,000lbs, Duellys.I use to get 16-17mpg now 40,000 miles later the engine light screaming o2 sencer needs replacement, 12-14mpg

I had a 35ft class A,96 Georgie boy 454, auto w/overdrive, over loaded and full with slide. 8-10mpg

Rating

1988 prevost
by: Anonymous

43,000 lbs, 8v 92 ddec1 motor. Prevost bus, Allison 5 speed.

I can't drive 55....at 68 approx I get 5 to 5.5 best ever has been 6

No difference between old motor and tranny verses new, will see after 50,000

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18 mpg
by: Anonymous

I recently completed a round trip between southern California and San Francisco area in my 1986 Toyota Sunrader and got 18.01 mpg. Plenty of hilly terrain as well.

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7.70MPG Trip to Moab
by: Almater

Just finished 2551 mile journey in my Jayco 26' 1988 Ford 460. Was extremely diligent at calculating mileage and came up with 7.70 MPG entire trip with 3 adults in the rig.

Be aware that Gemini Bridges Road in Moab is not conducive for motorhomes! I have an incredible video of the trip down the cliff side!

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Vixen XC Limited Edition
by: Anonymous

my vixen xc limited edition gets between 35 and 50 mpg 6 cyl bmw diesel , don't really check it uses less that my vw rabbit diesel I had sleeps 4 ,sink, and bathroom .

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running cheap
by: Anonymous

i run a 92 allegro with a 5.9 Cummings run used motor oil processed through a U.S. Filtermax centrifuge mixed with diesel and gas... have on board 175 gallons fuel. just went to Spokane running 60-65 mph om the flat some times 70 and pedal on the floor up the mountains -big mountains- got 5.2 mpg and had to buy some fuel to get home total cost under $200... doesn't smoke and runs good..having a ball looking to go 8.3 Cummings and biggert tank... see you at wal-mart

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Rv mpg
by: Madamex

i have a 35 ft Pursuit with a V10 with a tow haul option 6.8L getting ~12 mpg with generator, wind and mountains . Satisfied with that.....Washington state

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1983 Revcon, Duke 28', California
by: Dan Baxley

Front wheel drive Revcon with completely rebuilt 454 Chevy engine. After rebuild on first trip got 5.5 MPG then 6.5, same trip route of round trip 800 miles. Two years later, and several thousand miles later 8.75, same basic trip.

I have no idea why it has taken so long for this motor to seat up -- the old motor, even with all its thumping and knocking was getting us close to 12MPG at time with an average of 9.5 MPG. Now, finally, we are approaching the better side. Still beats staying at motels while on long trips and overnight stays.

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motor home mpgpoo
by: woc , Bill

Hi , We have a 35ft bounder motor home 454 eng 6 speed all trany . of course it depends on weather . normaly about 10 mpg . have got 12 & have got 8 mpg . with no hills & no head wind about 10 mpg . I hope this helps you . Bill

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'85 LeSharo
by: Anonymous

I get around 21 mpg with a 4 cylinder turbo diesel.... I am fully aware that it's under powered but I not trying to climb Mt. Everest ! It does just fine.

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We bought it, today! 1988 Bounder, 454
by: Stevens's

Sellers asked 8500.00 we paid 6500. WOW, it was 1500 over our budget.Very clean.Plan to use it for home dyalisis clean room and trips.Excited and scared.zzlots of good info. I see synthetic oil could be a plus. In Arizona temperatures vary dramatically between mountains and Phoenix.so can synthetic oil stand up to the stretch?

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Fuel mileage
by: Anonymous

I have a 03 Holiday Rambler, 40 foot, Cummins 330 horsepower diesel motorhome with an Allison six speed automatic transmission. If I don't run the generator and keep my speed around 60 mph I can get 11 mpg. I cannot stress how important it is to take into consideration the wind and if the road is level or very hilly. That being said, I have gotten as low as 6 mpg when traveling in Colorado and climbing the Rockies. Speed is another big factor. If I run 70 then my mileage stays around 9 mpg. That's a 20 percent drop for 10 mph but it's a personal choice. I also have noticed that if I use a diesel additive every other tank full, it seems to make the engine run better and to average a little better mpg.

Rating

mpg 8.1
by: Anonymous

25 ft trail light with a 8.1 liter. I get 10 mpg but have gotten 13 mpg going down hill from Osh Kosh to Alabama. Very light motorhome.

Rating

2009 Winnebago Aspect 28B
by: Anonymous

2009 Winnebago Aspect 28B, Ford 6.8L V10
Towing Nissan X-terra flat, 13,200 miles @ 7.84 mpg. With no tow vehicle, 1300 miles @ 8.90 mpg

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92 winnebago 32 foot
by: Anonymous

92 Winnebago 32 foot with Chev 454 A-Class. 8-10 us mpg depending how much i use the generator. Combination mountain and flat land.

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99 Rialta
by: Anonymous

Our 99 Winnebago Rialta HD with 3 liter VW V-6 gas engineand synthetic oil. We have put over 20,000 miles on her in a year and a half and have averaged 21-22 mpg with a high of around 24 mpg.
Love her!!!!!!!!!!!!!

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New to Rv/ Motor home world
by: Anonymous

Just purchased 96 fleetwood Pace Arrow Motorhome 34ft .I'm flying from Baltimore md. To Mesa Az. To pick it up but driving back to Baltimore md. I was excited about picking my new toy up until it was brought to my attention on how much gas it would cost me for this 36 hr 12 min trip back to Md.

Around how much will it cost me in gas to make it back to Md.? I don't know MPG or what size the tank is ( how much gas it holds ) and clearly by now you know I'm clueless on what I'm talking about.lol. thanks in advance, please help me. :-)

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MPG
by: 05 Monaco Knight

I own an 05 Monaco Knight with 330 Cummins Diesel, 3000 Allison. Toad is 08 Lexus 350RX on Dolly.
Got 9.5 from Phoenix to New Orleans via I-40 Scenic Route. Mountains and all.

Very pleased. Can't even feel the toad is there.

Rating

MPG
by: Anonymous

i HAVE A 1991 FORD class A 28' motor home with the 460 engine with automatic. I live in Colorado so their are a lot of mountain highways. When I drive on mostly flat roads I get around 8 mpg. I put a Vacuum gauge on it and if I drove by the gauge it would help quite a bit.
I put Archoil friction modifier in it but haven't had a chance to take a trip with it. Check Jay Leno garage on youtube archoil. I put it in my trailblazer and it helped my milage. They don't tout it as increasing mileage but if has helped. I put it in tranny and power steering. Will be interesting if it helps. http://www.archoil.com/
They have something for the Ford stiction (never heard of it) but I have heard from friend that it is amazing.

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2013 Winnebago Era 70x
by: Anonymous

Mercedes 3 liter diesel
16.8 pulling Honda cr-v toad
18.8 without toad
27,000 miles driven so far

Rating

1991 toyata 22 foot motor home
by: Anonymous

i getting 9 to 10 miles per gallon -motor home has v6 fuel injected motor

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Motorhome mpg
by: Anonymous

I have a 2000 Beaver Patriot motorhome with a Caterpillar 3126B turbo diesel an Allison MD 3060 with 2 overdrives a 4.39:1 rear axle ratio. This is 40 ft with 2 slides. Just completed a 2400 mile trip from calif to Michigan. Avg fuel economy is in this winter weather 8.8 mpg.

Rating

1988 Ford Jayco 460 V8 C3
by: Almater

I have analyzed my mileage over 30K miles and my average over entire time is 7.5MPG. I have done several long trips over 2500 Miles and the numbers don't budge much... I unfortunately was blessed with a 3 speed automatic in this vehicle. I have played with speeds and cruise control. The vehicle does have EFI and I equipped it with platinum plugs and new wire kit. K&N filter and have played around with additives like Mystery Marvel Oil and the like. I am convinced there is not much you can do to a vehicle the shape of a Giant FRIDGE and expect much more. If anyone has any tricks to improve the efficiency of this set up- Do tell. Thanks for the forum.

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MPG
by: kb7uxe

Out 1994 Winnebago Vectra, 5.9 cummins,P7100 injector, Alison MD 3060 trans. weighs just under 20,000 lbs. 20 lbs boost, 30-45 psi fuel, on long runs, towing a suzuki samuri, we got 14 mpg... on our short trips to the ocean, towing a heavier Jeep cj7 it gets just over 10 mpg. ( this includes stop and go traffic, and many hills. ) the best was achieved on the long flat roads from Washington to Minnesota.
Travel safe.

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2000 Winnebago Brave SE 26P
by: Outrider

If I keep my foot out of the 454 vortec, I have achieved 11 mpg. I will not push the shifts over 2500 rpm and I keep it around 60 mph. Hills are another thing, I would guess an average mph would be closer to 10. This is to be expected, weight + drag = crappy fuel mileage, just a fact of life.

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454 GAS MILLEAGE IMPROVEMENT, DO !
by: MANNY

OK, I HAD MY 454 GEORGIE BOY, 1976 BACK IN THE 80'S AND REMOVED THE #78 CARB JETS IN THE ROCHESTER CARB to 72's, CHANGED THE FLOAT FROM A STYROFOAM TO A BRASS FLOAT AND RECALIBRATED THE FLOAT. THIS CHANGED THE 7 TO 8 MPG IN THE CITY TO ABOUT 10 AND ON THE HIGHWAY TO ABOUT 12. I JUST PURCHASED AN 88 ITASCA SUNCRUISE AND THE FIRST THING I AM DOING IS THE SAME I DID ON THE 76 GEORGIE BOY,. IN ORDER NOT TO WASTE GAS ON A 454 OR "ANY" OTHER ENGINE, IF IT IS PUMPED BY A MECHANICAL PUMP, INSTALL A FUEL PRESSURE REDUCER/RESTRICTOR AND PUT THE DIAL TO ABOUT 5 POUNDS, INCREASE AS THE ENGINE NEEDS IT. THE FACTORY PRESSURE IS BETWEEN 10 TO 11 BUT OUT OF THOSE POUNDS OF PRESSURE, YOU WASTE AT LEAST 3 POUNDS EQUALLING IN FUEL AS UNBURNED FUEL, STRAIGHT OUT OF THE PIPES. TRY IT Y'ALL LIKE IT.

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Guess I'll keep mine! 15-16 mpg
by: John

I've got an older Itasca Phasar (Lesharo) 17 foot that has had the drive train swapped to a '97 Buick V6. They originally had a junky Renault 4 banger (get out of the way) that is notorious for breaking down in the middle of nowhere. Not a bad RV overall, but it's an ongoing project.

On our several camping trips with it we've gotten about 14-16 mpg with decent power. The cab is a little noisy with road noise, but I guess I'll deal with it. I can't imagine getting under 10mpg on an RV for as little camping as we do. And taking a trip in something that gets 6-8 mpg is just way to much for my pocketbook.

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40ft holiday rambler limited
by: Anonymous

40 ft Holiday Rambler 3208 cat 22,000 lbs 65 mph over 10 on the flat Ford Focus on dolly 4 speed Allison only mod was another 3 inch hose on Donaldson air cleaner Gillig air ride chassis the thing of the diesel verses gas you have full air brakes you can stop and 22.5" wheels every thing is bigger

Owned both gas and diesel no comparison I have 80 k on the motor and looking at the 50 series Detroit thinking of re-powering not that I need to but enjoy tinkering lol

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MPG on 89 24ft GULPstream
by: Matf

6.2 all the time, every time.

Ford 460

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2000 sterling super c with c12 cat
by: Paul

2000 sterling class 8 super C with cat c12 430 hp 13.5 mpg Canadian with 2 liters of motor oil added to fuel tanks diesel and no one is passing me.

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milage
by: Anonymous

Im running a 1999 fleetwood bounder 34 foot.

6.8l triton v10.

if I do 60-65mph, I might as well just cut a hole in the gas tank and let it drain out for what its worth. I estimate around 5-6mpg.

I typically run her around 50-55mph and I get a nice stable 8.7mpg which from what im told is quite a respectable number!

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thought class B would be better
by: DAVE D

Just got a 1987 Chinook Class B, It has a Chevy 350 with a QJ. I was quite disappointed when the best I could squeeze out of it was 8.5 MPG. It runs great and seems to be in good tune. Live and learn.

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Old 454
by: Steady

I live in Washington state and have a 1993 Fleetwood Bounder which was bought new. The unit is 29' in length with a 454 TBI Chevrolet engine. The coach is loaded to the max but never tow. The original engine and transmission are just shy of 200,000 miles and it gets between 9.0 and 9.7 mpg consistently, which is the same as when new. The best recorded mpg was 10.2

I installed a Banks exhaust system but this did not improve the mileage to any noticeable degree, using the same driving habits. The engine has never been rebuilt.

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rediculous
by: Anonymous

sorry bout the other folks posts, but ANY mention of their mileage without knowing what engine size, what their loaded weight is, how and where they drive is completely pointless. Ask those who have the exact same rv YOU are looking at.

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1988 Class A Safari 460, C6
by: Anonymous

1988 34ft safari Serengeti towing 2400 lbs
mountain areas. bought MH with 66000 and was gutless for the size

I opted modify the engine due to a cracked exhaust manifold from when the engine was stock.
460 C8VE ported and polished heads w/ roller rockers latunia roller cam that is timed 5 degrees wiend split plan, ford carburetor
Rhino exhaust ford C6 transmission w/ gear vendor O.D. stock 9 MPG through this route (gutless)
Now 5 MPG through this route (still gutless)
though its slightly better on the hills we find ourselves leaning forward on 7-8% grades in hopes it helps "kidding".

I hate this motorhome "not kidding". just too big for winding mountain roads that never seem to get better.

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87 Itasca Windcruiser 31RT
by: Lodnrat

454 7.0MPG some Mountain passes and some flat 60-65

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what is HHO?
by: smith

What is a HHO installed? and how does it increase fuel mileage? have 1996 Minni Winni 26' gets 7MPG

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MPG
by: Ed and Teres

We have a 2011 Winnebago Journey WKP 40U. It has an 8.3 L Cummins 380 hp engine. We average 8.4 overall according to our on board computer. In Florida, we have seen 9.5 on some tanks. Back home in the mountains of northeast TN, we see 7.6 on our tanks. Great power pulling a 4700 lb car and getting those numbers.

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96 TREK GMC Diesel
by: Roger

Have '96 TREK Pathfinder Chevy diesel by Safari. Have been real pleased with milage average is about 12.5. Have done as well as 14 with tail wind and as low as 10.5 if I push it in the mountains. Not a lot of power but once the fuel pump (common with this motor) was replaced it has worked very well for a small Class A coach.

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Jayco seneca
by: Anonymous

2015 Jayco Seneca with a 5.9 Cummings and 6 speed allison transmission. Getting 7.5 to 8 mpg.

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1986 Winnebago Lesharo
by: Anonymous

turbo diesel, front wheel drive. 22mpg
I've owned 6 of these. I have gotten as high as 24 mpg once or twice.

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MPG
by: Sabretooth

We have a 1992 31ft Gulf Stream with a Cummins 5.9 turbo (190 HP) and an Alison (542) 4 speed Automatic.

Our average speed is 58 mph and we average 9.97 mpg, that's hill and freeway included. (That is a pen and paper calculation not a computer).

Previously we had a 1996 GMC with a Chevy 454 7.4 ltr Engine and a 4 speed transmission with overdrive, We towed a 2 axel 33 ft 5th wheel and averaged 10.3 mpg using 87 octane.

Hope this helps

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Keepin it real !
by: msrc

This is just food for thought, but this is a fact, all you 34' 454 users getting 9 or less passed me at some point. Mine a 86 pace arrow 454., low 11, 13 high. Drove 55 hwy, used castrol 10 /30. 2003 dodge sprinter 9 pass with 6 passengers. Pulling a 24' 9 bed palomino with two slides gets 13 to 21. 5 cyl 2.7 ltr. Gets driven, guess what, 55. The only ford engine worth investing in is the old 7.4 turbo diesel. Gets 16 in a Ff350 pulling a 12000 pound rock trailer full of rock or cruising empty at 55. Hint, Hint, ifen you want mileage quit driving like mario andretti.

Just a side note for all the smart ones here. When you burn oil where does it go ? Anyone heard of a cat? Well there is your answer. Back pressure. The pace arrow had a bypass welded in when i bought it. My previous carb 85 winne 24' could never do better than 10

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Revcon 28'
by: Dan

Put in a new engine. Old engine with synthetic oil got 11.8 mpg in best conditions -- averaged 8-9 in mixed coastal travel. New engine with new Qjet four barrel, and getting 6.5-7 in same terrain. switched from break in oil to synthetic after 2,000 miles and still only 6.6 mpg. What happened to my 8-9 mpg. The engine and coach run like a dream -- not kidding the engine is powerful and runs so smooth and starts like a charm but the mpg stink. Guess I need to find more down hill runs to coast? Anyone with a suggestion?

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Mpg
by: Anonymous

I have a 1979 dodge Minnie Winnie 24.5 ft it has a 6cyl Isuzu diesel special order from factory as far as I know it's the only one in existence it gets over 25 mpg

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89 fleetwood bounder,30 ft 454,automatic with a gearvenders overdrive underdrive
by: Anonymous

I use mine as a daily driver in austin
The gas tank is full, 90 gal, 640 lbs

It costs me a little under a dollar a mile
I fill it up every 50 miles.... cost between $35 and $45 bucks with gas fluctuation between $3.39 and $3.59 a gallon...... I have my painting equipment and my personal property..total weight well below a thousand pounds...

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1994 Holiday Rambler
by: Jr

I have a '94 Holiday Rambler Navigator 40 footer. Engine is a C8.3 Cummins with Allison trans. Fuel pump turned up to 335 hp. At 60 mph I can get 12.25 depending on terrain. On the interstate going 70-80 only get 9.5.

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5
by: b jones

My 1979 28' Airstream Motor Home gets 10 mpg mountains,12 mpg in hilly and flat land area,
Mild head winds. It has a gm 454 after mart billit electronic destributor racing hi voltage coil. Headers and a U.S.GEAR over drive bolted to a turbo 400 trans makes it a 6 speed transmison. tires are 19.5. I cruise 65-70 mph about 2500-3000 rpm. The Airstream is aerodynamic and light weight atributes to getting good results, compaired to the other shoe boxes on the road today

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class c motorhome gas milage
by: Anonymous

I had a 1989 ford 26' Jayco motorhome with a ford 460 engine. No overdrive and if I ran 70 mph it was 7-7.5 and if I ran 60 I could get 8-8.5 it did have plenty of pulling power towing a Chrysler pacifica but the milage went to 6 mpg

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1978 Holiday Rambler Class C 27ft
by: Anonymous

55 mph, ford 460, c6 trans, 9.5mpg.

Simple rule: If I hear wind noise from cab-over windows. slowdown. Wind resistance is the killer on gas usage.

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Fuel Milage
by: Anonymous

We have a 2006 American Tradition with a 400 HP Cat engine. Our gas mileage averages 6.5 mpg.

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mpg
by: cal

I have owned a lot of motorhomes and here is how they turned out.

Older Mercedes in mid 80's 30' 4 cylinder diesel non turbo class A got 17 mpg no power going up hills 50-55 mph

1995 Navette with a 4 cylinder diesel 30' got 13 mpg. Again it was slow on the hills pulling my Toyota pickup it got down to 55 mph

3 Airstreams Motorhomes
20ft with 454 would get between 9 - 10 mpg
24 ft about the same
34.5 ft around 8 - 9 mpg

2 Toyota late 80's
17 mpg on the smaller one (odyssey)
(Sunrader) 17 mpg and its was a lot larger

The little motorhome would run with the traffic through the mountains with ease All fiberglass bubble top designed for no wind drag I buy and sale semi trucks and motorhomes and this was the one I would take to go pick them up. Loved it.

Chevy Eldarado class B would get about 10 mpg mid 80's

1994 Class C 35 gulfstream with 3 axles & 460 overdrive got 7.5 running with traffic 75mph from Florida to Ky. From Ky to W.va I slowed down to 55-60 and got 10 mpg

1985 Chevy class B turtle top van with 305 3 speed gets 10mpg (big disappointment)

1996 converted city bus with 5.9 diesel from Montgomery to Ohio got 13 mpg running hard It would pull down to around 55 on hills

40' Blue bird got 10 - 12 mpg with 5.9 cummins average driving in the flat and hills of W va Couldn't believe the power the bus had but it was a new 5.9 from factory with 280+ hp big intercooler etc.

2007 Ford 34' from Ohio to Oregon and Wa v10 running hard 7.5 mpg summer of 2013

1978 conversion chevy with 350 engine and 3 speed auto was excellent. Bought it with a bad camshaft. Replaced the cam with a 270/280--- about the same as a 3/4 race cam, which would get me 18 mpg. lots of power taking off towing and good mpg on top end.
I used this for towing in vehicles for yrs.

I kept the 94 ford 3 axle 35' slides class C and plan on replacing the 460 with the 280hp 5.9 cummins. Allison transmission and a auxillary overdrive this summer. This should get 13 - 15 mpg with the auxillary overdrive adde & having plenty of power in the mountains.

The 350 chevy engine is the only one that its profitable to change the cam in for better fuel mileage I have found.

The old 78 chevy van was the only one that made me happy when I pulled in a gas station. I had a 85 Chevy pu 4 x 4 305 with 4 speed standard overdrive that was excellent 20mpg. with 3.42 gears.
Very seldom do you run in to something that gets good mileage, never let it go. The pickup was rebuilt 3 times after wrecks because I knew I would never find another that would do that good.

If you get a big class A diesel the best on fuel mileage is the Detriot 11.7 series 60 . I kept a
international tractor for towing in vehicles and it would get 11 - 12 mpg. The Series 60 with the 12.7 will not get that mileage. The 11.7 is about 350 hp and the 12.7 is in the 4s -500 hp range. The 11.7 will have all the power you need
in the RV market for 8 - 1,000,0000 miles easy

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1987 Shasta Class C 27' 460
by: Karla A.

Has all the expected equipment, one roof mounted AC unit, 4.0 Onan generator, full length awning, spare tire mounted on back, all appliances, sofá bed, 2 swivel chairs across, no dinning seats, bedroom all the way in the bCk.

8 cal 460 Ford engine, 4 barrel carburetor, automatic 3 speed transmission, all stock. Original 68,000 miles (today's date 01/01/2014)

new carburetor rebuilt, all new spark plugs, wires, air filter, motor oil, front end, etc.

driving it gentle & keeping the foot off the pedal as much as possible, not exceeding 65 mph.... I have got an average of ONLY 6 mpg top :-(

great power, but not having over drive is a huge problem since it always has to run into 3rd gear bringing the rpm higher and therefore more gas consumption.

gear ratio is stock, all stock.

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No solutions
by: Dan B

This is a good site, if misery loves company. Now I don't feel so bad. And will stop thinking there is something wrong with my 83 30' Revcon 454 Chevy when only getting 7-8 mpg on my new engine -- yep, pulled the old engine and had it completely rebuilt -- but a funny thing, the old engine was getting 9-10 mpg ???? I was running synthetic oil in the old engine but it was using a quart of oil every 300-500 miles -- do the math.

After the rebuild it took 3,000 miles before the new engine seated and does not use oil like that anymore. But, I have trying to use up the storage of regular oil I had before going to the Synthetic again. What does this mean? Well, after reading the comment here the common thread for and actual increase in MPG is the synthetic oil.

I promise to write back after my first big trip with synthetic oil on the new engine. Even if you can get only a 1 MPG boost, at todays gas prices and being anxious about the next fill up that 1 MPG would give me an extra 54 miles to find a gas station.

If you have an engine that is not using up oil like gas then it would seem, from the reports here that using the synthetic oils would be the right move. Some inflated MPG and mental averaging does not count, guessing is worse and is like denial. The gassers need help, so does anyone, or has anyone found a solution beyond the Synthetics?

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2005 Bounder MPG
by: Mark & Debbi

We bought our 2005 Bounder 34F 2 years ago and have driven over 10,000 miles. We almost always tow a 2002 Saturn. We average 5.9 MPG towing or not. I am thinking of buying a diesel pusher to get better MPG.

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1990 Damon Escaper Ultra Sport
by: Anonymous

Can anyone tell me the MPG expected of a 1990 Damon Escaper Ultrasport Model #2002LE M-350 EFI engine, length 22.5 electronic fuel injected with HD Automatic transmission with auxiliary transmission cooler. Thank you

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class C
by: Anonymous gt

1987 26ft Tioga Fleetwood - Chev 350ci 4barl carb - 10,500lb gross veh weight - 54k mi - 87 oct gas - 10/30 conv oil - flat terraine - driver only - empty
55mph highway 10mpg - 50/50 hgwy/city 7.5 mpg

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newer motorhomes?
by: Anonymous

From the few I have talked to that have the new motorhome -- 2000 and up they are not getting much better than what the older coaches are giving. It seems to me that when you get over 30 you should go to diesel and it seem they all stay right in the 10-11 mpg range no matter what, towing or not.

A couple of people giving upwards to 15 mpg for a gas motor need to check the accuracy of their odometer -- I'm thinking the math is either off or the odometer is. Use the mileage markers along the highway to do a simple check. Much of mpg is determined by speed -- keep it in the 50 mph range and mpg improves a lot -- you just have to put up with everyone passing you and a few, "Get the hell off the road you old buzzard", shout outs but other than that the ride is smoother and mileage better and at the end of the days travel you are actual still a civil human being.

Peace to all you travelers, Dan and remember to Praise YaHshua our Lord and Savior -- hallelujah

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M P G
by: stevie

hi
I have a 1993 ford fleetwood bounder its 32 foot in length and its doing about 10 to 12 miles to the gallon. Am putting in a gas conversion with in the next few weeks. When I was buying mine i wasn't thinking of mpg there finish is better inside,
Oh yes I still have to service it yet

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Mileage follow-up
by: Capt. Skip

Well, I took the trip, San Diego to Phoenix to Tuscon to Phoenix to San Diego. I took the Southern route through the mountains. Major wind, sideways rain, pretty much lousy weather. Parked in a Wallmart Parking lot each night, so I ran the 4kw generator a lot. My freeway speed was 65mph, on cruise control, including up hill through the mountains. I got just shy of 10mpg overall.

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1992 26' class c minnie winnie
by: Ron Junkert

I have a 26' 1992 Minnie Winnie class c on a f450 running chasis with a 460 fuel injected. No slides fully loaded with all our crap. And towing 4 4wheelers I get right at 15. It has an rv cam 3" crome hedman exhaust all the way to the rear axle

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My Coach MPG
by: Capt. Skip

I have a 2004, class "A" 26' Fleetwood Fiesta on a Workhorse Chassis, driven by a 454 gas engine through an Allison trannie. I am currently averaging 10.4mpg highway driving through Crazy Southern California Freeway traffic. This week I am taking a road trip from San Diego to Tuscon & Phoenix Arizona, and back to San Diego. I will log back on and update my MPG.

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05 Dodge Cummins (stock) w/34' Airstream
by: John A

I can get as good as 14 and down to 12.5 pulling a triple axle 34' Airstream, if I have to predict my fuel economy/costs , I figure @ 13MPG then I'm pretty safe.

All my driving has been in the Rockies of Utah, Idaho, Wyoming, no flat spots to brag about .
My truck is a 2005 DODGE 4 X 4, with 325hp CUMMINS, bone stock , no oil additives , nothing . I have about 85000 miles on it.

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MPG
by: Anonymous

Fleetwood Bounder 35k V-10 9 miles to a gallon

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1994 28' shasta class C
by: gyjdusmc

What should I expect to get? gonna buy this week. has 43,500 original miles. thanks

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MPG and fuel filters
by: jaminjimi

'96 Allegro 34', no slides, with Chevrolet 454 7.4 Liter TBI on P-30 Workhorse frame with 4 speed O/D transmission and Banks Power System, the unit has 76,000 miles. I get 7 mpg just about any time, while pulling a Geo Metro toad up and down the hill's in east TN, KY, OH, WV, VA, NC, PA, GA and the flats in FL. That includes me running the generator and dash air (yes mine does work). Tires aired to 95# and fresh water about 40 gal, and usually empty black and grey tanks with fuel tank topped off. I am sure I could increase that mileage but I run 65 and 75 mph, even up some of those hills. Now I have had episodes when less than 4 to 4.5 mpg had me crying, but it was due to fuel filters and some minor maintenance issues.

I use a full synthetic oil 5W30 and regular gas with an occasional gas additive or treatment. Keep that fuel filter clean, air filter clean, and just watch the plugs and wiring, they are known for breaking down. I once got 8 mpg but that may have been a fluke, bad math or an anomaly. I believe this is very much average for this unit or any unit with comparable attributes and similarities not just from my experience but from what I have read and others that I have spoken to (not speaking for the Ford 470, though I find them to be very close in average consumption of that precious resource known as gas). Not that this will help anyone, just wanted to give my side of the equation.

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Holiday Rambler CF-34 88" 454 3speed Auto
by:

Holiday Rambler, 34' Class A, 454CI Chev, TH475 Trany, dual pipes, 8X19.5Tires, Tag axle, towing EZ tow dolly with Honda Odyssey. Rolling hills, 55-60MPH, 5.6 MP

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MPG Revcon
by: Anonymous

I ahve a 28' Revcon, tandem wheel and front wheel drive. On old engine, 170,000 9-11mpg. Rebuilt 454 Chevy motor, trans and new brakes, shock, wheel and tires. Edelbrock manifold and carb - first breakin miles 500, 9.5 mpg. Would not pass Calfornia smog later because of Edelbrock carb -- switched out the carb and replace it with the original Q-Jet that I kept -- passed smog then after 800 trip, mixed mountains and flats, coastal travel - 7.5 MPG. Rmember, this is the same carb I was geting over 11 mpg on the flats averaging 9-11 on the old engine, It's the smog settings that kill a lot of the MPG gains you might want. I think it is in the timing they set to make it pass smog. Burn more? Pass smog? Something is wrong here. I will reset the timing and expect to get back to 10mpg --

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MPG in 1989 Chev. Class C 23' loaded
by: Peter

My wife is going to make me lie re the mileage as she keeps buying more stuff along the way. Now she is looking for a good new laptop, finding that the ones built in the USA are better than the canuck built or sold models.

Well I can tell you this climbing up Grants Pass was not all that great today in the heat and all but overall we do around 11 to 12 mpg with a 182,000KM's on a 350V8 with a Turbo either 350 or 400, not sure but I know it does not have OD.

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MPG
by: Joe

I have a 40' American Dream, Cummins diesel, 6 sp tranny. Over the pass between Barsto to Bakersville, pulling a Prius on a tow dolly, I got 10.4 MPG. I was pretty pleased on this big of a rig.

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2012 BOUNDER 35K 36 FT 4 IN. TOWING A JEEP WRANGLER
by: Anonymous

V-10 Gas mileage, 4.8 IN THE MOUNTAINS. ROLLING COUNTRY 5.5 TO 6.0. FLAT GROUND 7.0. GET ABOVE 65 MPH IT GETS WORST. THATS THE TRUTH, THE WHOLE TRUTH AND NOTHING BUT THE TRUTH.

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MPG with diesel
by: Anonymous

I have a 89 Gulfstream 31 footer with a 5.9 cummins and Allison 4 speed. Recently took on the road from San Antonio to Fort Worth and averaged 10.75 miles at 65 mph throughtout the 530 mile trip. No slide out but, loaded at approximately 20K lbs with campaing gear, goodies, half tank of water (30 gals) and no cruise control, so right leg was killing me.

Looking to upgrade with new fuel pin and governor spring, amsoil in motor & rear, and give it a well needed front alignment job.

Will report back with any increases in mpg's after mods.

Go RVing.

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custom made dodge rv
by: Anonymous

9 1/2 and 3 quirters miles to the gallon its 2 30 footers i weilded together, givenme a 60 foot and 1 and 3 quarter inch dodge,,with a 6 cylinder 3 on the tree...

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How I got fuel economy in 34ft motorhome
by: Anonymous

I bought a 1987 34ft Holiday Rambler Aluma-lite with 65,000 miles last year. It has a 454 chev engine hooked to a THM 400 trans. My first tank of gas driving from AZ to WA I averaged 6.6 mpg. After I got there I noticed my tires were badly worn. I bought narrower tires and had the unit aligned (it was badly out of align)that actually helped gas milage slightly.

The biggest increase came from changing to a synthetic oil (I used Amsoil) but any may do, not sure. That increased my milage by a wopping 1.8mpg. I was quite happy.

When I got back home to Arizona I asked the local Amsoil dealer if changing the tranny fluid to Amsoil would help with fuel milage. He said he didn't think so but it would run 50 degrees cooler.

He did say that changing the rear end oil would help though. I did both. At this point my fuel milage was 8.8 to sometimes 9 mpg. I had the carb rebuilt and the timing changed slightly. Took a trip to Disneyland, about 800 miles roundtrip and averaged 9.6mpg. Mostly flat except in the hills of California.

Next I changed to a K&N airfilter and increased my tire pressure to 100lbs in the front and 90lbs in the rear dualies (I also have a tag along axel with a single tire behaind the dualies, which doesn't help milage any).

I think that is the reason why later large motorhomes have, for the most part, gone away from that tag along axel. I drive 58mph to 65mph depending on the road. I do not use my cruise control except on the flat. I feel like I can "feel" the engine better in the hills without cruise control.

For the most part I now get between 9.2mpg and 10.4 mpg, except in the mountains of course. I do not tow anything and I feel like this is the best I am going to get. It has just been a lot of little things with the synthetic oil making the biggest difference.

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1988 Ford 460
by: Dan/Rej

1988 Ford E350 Travelaire 460 engine, last trip 20000 miles got about 9.6 per gallon. Pasted all motels and restaurants.

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93 fleetwood bounder 454
by: John and Conni

Our 93 Fleetwood Bounder 454 with Allison gets 6 to 7 mpg towing or not.

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RV Miles per gallon
by: Tars

Our 1987, Foretravel Grand Villa, 36 foot gas pusher, Ford carburated 460 v8 with an Allison 4 speed, headers and Edlebroc 650 square bore carb gets up to 6.5 maybe 7 mpg holding my breath on the flat with no headwind, not heavely losded, empty tanks and little gas and no toad.

4.5 mpg loaded, full tanks, with a Jeep Wrangler toad and up and down the coast range as low as 4.5 mpg. hitting 65 mph most of the trip when on the flat and sometomes crawling up the hills at about 30-35 mph.

We can average 5 - 5.5 being slow (55-60) and careful when traveling on the freeways when loaded to the max. We normally get about 50 to 100 yards behind a big truck and stay there.

Our 1989 Ford 27' Telstar class B/C, 7.3 NA Ford/ International diesel and gets an average of 10 mpg. Like I said its a diesel which now makes us both sick if we get a good whiff of the exhaust so we drive the bigger Grand Villa most of the time. The Telstar is easier to get into smaller spaces and up into the moutains. Its our fishing hooch.

If you want good mieage the smaller the better. Diesel gets generally better fuel mileage. 5.9 diesel Cummins seem to do quite well.

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MPG ON FLEETWOOD BOUNDER????
by: dik

I have a Bounder 38' w/300 cat w/turbo and get 6.5 with or w/o towing

dik

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MPG Bounder
by: Anonymous

2400 miles Florida to New York
2012 Fleetwood bounder 35k not towing anything
70 mph max average 65 mph passing at 75 mph
2250-3200 rpm
6.5 mpg this trip

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More MPG
by: HiMiler

Carbureted big blocks are a real challenge. Hi flow intake and exhaust help. A good pre-emulsion carb, like the right Holley that has been torn down, trued and detailed helps. I've done that and can gain up to 10% on the carb alone. The timing chain and gears wear and stretch, losing MPG. It can matter anytime over 50k to 75k on big blocks, maybe sooner depending on oil and change cycle. The proper camshaft makes a difference. Matching ports between intake manifold and head is important. I've custom timed each cylinder spark to it's own TDC and gained MPG (due to crank inaccuracy common in older big blocks). Gears are important to keep cruising RPM's down. Watch tire pressure. Cruise control only works on flat roads, overreacts on hills. A vacuum gauge does not do it. You can see high vacuum in a lower gear but get terrible MPG. Tests were done by the EPA, DOE and others that found driving habits can reduce MPG up to a third. Towing my 5th wheel, I use a ScanGauge for an instant MPG readout to tell me when I'm doing good and when I'm wasting gas. Lower speed and coasting are big factors to stretch MPG. I got mine at scangaugesales.com. Lots of info there.

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No computer just basic engine and trans
by: Anonymous

Retired auto tech. I have a 1977 Argosy by Airstream 24ft 12,500 gross with 454 BB 625 CFM Quadrajet.TH400 trans with 4:10 rear end and the best I can get after modifying the headers and fan clutch, opening the exhaust to 6"total is 8MPG.

Engine has 87,000 original miles. Went from 16.5 wheels to 16's narrower tire, higher pressure. Vehicle has Oil cooler, trans cooler,ps fluid cooler.
K&N air filter,Delo 400 30 weight oil.I looked into a gear vender but the cost would take years to pay back. I could go to OD Trans, but the TH400 has been bullet proof for years. I drive using a vacuum gauge and most of the time 65mph. Going to try 60 with cruise and see what happens.

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07 Kodiac 5500 Greyhawk 33'
by: Gizmo

2007 Kodiac with 8.1 gas with allison 5 speed gets 8-9 mpg on flat land running 60-65 mph.

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91 south wind
by: Anonymous

We have a 33l 1991 South wind with 85000 miles. We drove it 1200 miles from where we bought it to the house. It got 9.6 mpg all highway completely dry. Meaning fresh and waste tanks empty. Chevy 454.

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My bounder
by: Anonymous

Just got a 1987 fleetwood bounder 30ft went to lake taho and round trip from Boise idaho used $831.00 in gas had head wind all the way there and some back home. I now call it the pig how much horse power does that year of engine have it doesnt feel like much.

concerned : oink oink su weeee?

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HHO
by: Anonymous

Had a 89 27' ford c 460 got about 5 mpg until installed HHO,, and then it went to 12.5..

Now we bought a 92 39' winnebago with gas 460 and over drive..

Previous owner said he could get as high as 10 mpg with premium gas,, but I put a 6 cell HHO in and It is running about 14 on regular fuel, and I only run the unit with a draw of 17 to 19 amps..

All I did is direct the HHO into the air uptake, no conversion at all,, but apparently previous to 96 no conversion was needed..

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99 Winnebago Cheiftain 35U
by: amzbrady@aol.com

I have a 1999 Winnebago Chieftain 35 1/2 feet, 2 slides. With 68000. 454 7.4L. I run Castrol Syntec 5/30 and will be putting Iridium plugs in before my next trip. If the mileage increases I will repost. Currently I get around 5.75 MPG. Towing my 02 Jeep Liberty I get around 4.8 MPG. The 454 just isnt a good choice compared to the 8.1 workhorse if you have to have a GM. The Ford 6.8 seems to get around 7-8 MPG from people I've talked to.

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'98 Itasca
by: Anonymous

We drive/live-in a 1998 Itasca Sunflyer. Comes with a 454 Big Block Chevy engine. Tranny-? We pull a 2001 Pontiac Montana on a car dolly. 10 MPG.

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Tiger astro conversion 1989
by: Anonymous

16 to 17 mpg

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Serrano 31X
by: Fomentous

2011 Serrano 31X, 6.4 liter IH Maxforce7 with Allison 6 speed. 5000 miles so far. Rig is 33'10', 23700 lbs loaded including Jeep Wrangler Toad. 10.7 on grades, 11.5 overall, 12 best so far. Have not had it on flats yet

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Diesel and toad
by: Anonymous

1987 Vogue III 35 foot and towing a 1998 Jetta we get 9 mpg on average. Cat 3208

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MPG Range
by: Xterrable

8-9 mpg. 1992 Tioga Arrow 28' Class C. Ford 460 (7.5L) Fuel Injected. 58k miles. Conventional Motor Oil.

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Are you telling the truth ???
by: Anonymous

Some say 13 mpg, really ? I have a 92 Winnebago Chiefton, 32 foot, 460 ford, injected, average is 6.5, almost did 7 on high-test. Pa. to S. Carolina.

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motorhome
by: derek and tommy

i get 10-12 miles per
gallon! bad motorhome!

do not get a lance

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What is your RVs MPG
by: mark

I have a 1985 Class C Minnie Winnie/Winnebago, 26 ft, with a 460 4 barrel carb. The best I got was in New Mexico with a 40 mile per hour tail wind pushing me. I got 13MPG. But on a flat level surface, loaded down without towing, going 60 MPH, I get on average 8 MPG.

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MOTORHOME MPG
by: Anonymous

A 1985 21 ft Toyota. Just took a 499 mile trip to kansas from around Shreveport. I averageed about 17.2 mpg. However remember this is only a four cylinder

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95 Holiday Rambler Endeavor
by: Anonymous

460 FORD,Class A, 38FT. 6-7 mpg, installed a Banks exhaust 7-8mpg, changed oil to synthetic....no differnt mpg, but ran a lot cooler.

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MPTank?
by: Kentucky

2002 Coachmen Mirada with 454 chevy and we get 9-10 mpg. I'm trying to figure out how many miles can I go for 70 gal of fuel?

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1987 Aristocrat Establishment 34'
by: Anonymous

Just obtained this RV & I just drove it from Denver to Pueblo, CO...averaged 5 mpg or less with a chevy 454 that has ynder 22,000 miles on the original engine and this was after having installed new sparkplugs, new distributor, and a new rotor...what is the problem with my crap mpg??? Does anyone know how many gallons of fuel this RV holds?

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RV & GAS
by: Anonymous

2000 Georgie Boy 33.5 workhorse 454 and towing a mustang at 58 to 62 10 to 11, 63 to 68 8 to 9.5 and over 70 forget it. Sold the mustang for a 1997 Geo Tracker 4 wheel drive with a weight of 2300 but have not towed it yet.

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1998 Itasca Sunflyer
by: Steve & Sheila

Class A 34"
454 Chevy Big Block
With a tow dolly & Pontiac Montana
Drive 62 mph and get between 9.2-10 mpg.

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1992 Fleetwood Bounder
by: Anonymous

1992 Fleetwood Bounder, bought July, Ford 460, 31K on the engine. 31'8" model.

Total tune up (everything that can be), put in Castrol Syntec ~expensive synthetic oil.

Drove ~6500 miles NY to Seattle & back, drove REAL easy, ~60-65mph most of the way across (not 70-75mph), and didn't floor it on hills.

Got 9.16mpg. Oil was still pretty clean after.

A lot better than I thought, was told to expect worse. I also had it loaded to the max, got onto a scale at one point. I'm sure going up Mt Rushmore in 1st gear, it was <1mpg.

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31' Coachman mpg
by: Anonymous

I drive a 31' Coachman Freelander (one slide out) mostly on the I-5 corridor. I get 6.2 at the lowest and have gotten as high as 9.4. It has the ford V-10 and automatic. I do not pull a tow anything, but we have eight kids (bio and adopted). Our home is in Olympia WA.

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2008 Itasca Sunrise
by: Anonymous

32 FT class a with Workhorse 8.1 gets 6.5 MPG, same MPG when pulling my Wrangle

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6.5 mpg
by: Lyman

1997 Itasca Suncruiser, Ford 460, 34', 1 slide, gets 6.5 - 6.7 consistantly; drops to 6.0 in extreme wind or mountains.

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2003 Coachman Aurora 33' A class MH RV M P G
by: Ron & Carrie Conner

Weather and terrain (optimal)10 mpg @ avg.speed 55-65mph>>Unit Power> FORD V-10 (gasoline eng...Allison auto. Trans.
For less than optimal travel conditions {Head Winds and mountianous terrain with grades up to 7%}can reduce my MPG by as much as 4MPG depending on mountian elevations.
Have a safe and joyful Trip...GOD BLESS YOU
Ron&Carrie

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motorhhome mpg
by: rick

I average towing a jeep liberty including pulling hills 7-8 mpg with a 454 big block chev, used to be 5-6 switched to synthetic oil and ran cooler and just seemed to run out better, when I do not tow I can get 10-11 this is a class a 34ft.

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76 Class C Dodge, 21 ft
by: Anonymous

360 small block, 2 barrel, stock. 8-10 mpg.

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1987 fleetwood bounder
by: Anonymous

1987 fleetwood bounder, 454 V8, auto tranny, previous owner said around 8-10 mpg, we just bought it and haven't taken it anywhere yet to see.

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2002 Dolphin MPG
by: Anonymous

Out 36' motorhome gets approx 9 - 10 MPG. Note that we are in Northern Idaho and it ain't flatlands!!

Stock 8.1L Workhorse

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95 Beaver Patriot 38' mpg
by: Wisconsinite

300 hp Cummins, Allison 6 speed transmission, 38' gets on the average high 8 to over 9 pulling Jeep Wrangler toad. Previous owner at times was over 10, but lived in Florida where it is alot flatter than where I drive.

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mpg
by: Anonymous

05 Fleetwood Expedition 38ft 300hp CAT 6sp Allison auto 9.7mpg

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Dodge 2500 cummins deisel w/ Lance 1025
by: Joan

We get 13 - 15 MPG fully loaded

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