MPG for Various Class A Motorhomes

I get around 8mpg...2006 National Seabreeze LX gas....Ford F53...no toad for now.

Al

We are getting right at 8 mpg but I doubt we have really broken it in yet... approaching 4k

For anyone who is interested, the heavy trucking industry has stated that since 2009 diesel engines now are getting .2 MPG better mileage per year. This would mean if a engine was getting 6MPG in 2009 in 2019 that same HP engine will get .2 x9 or 1.8 MPG better mileage. Also keep in mind you also now must use DEF.

A heavy foot can degrade the MPG very fast. I drive F-53, V-10, Itasca at 66-67 and average about 6.3 with Jeep in tow. Little less going to the mountains ans a little less coming down. 6.5 on flat roads.

I have a 1996 GBM with the 454 TBI 33 ft weighing 15,000 lbs and have averaged 8.6 MPG over 100k miles of travel. I tow a 2500 lb car and don't see any difference in towing or not towing. I dry camp 95% of the time but use the genset very little. I drive at 62 mph mostly on the freeway. I do better on secondary roads in 4th gear between 45 - 55 MPH(over 9mpg). Tried lots of things to improve performance and MPG but adding headers, FF muffler, CAI and advancing the timing all added performance but no mpg increase. Adding a vacuum gauge and keeping vacuum over 10 in of hg will add about .25 mpg if I follow it. Some on here have seen mpg increase with these types of improvements but not me. Slowing down is the only mpg increase that I have seen. My 3 friends with DPs all get less mpg because they are twice my weight. I would be interested to see what small class A's or C's average.

30' 2004 Itasca (Workhorse 8.1), towing: 6.5mpg, not towing :8.5mpg. I drive between 60-65mph.

Because the MH's that use a diesel engine tend to be larger and heavier, the answer will be the same for a diesel engine if not slightly lower. Power and torque and the rear engine location are the reasons most folks buy a diesel. Fuel mileage is NEVER a reason to buy or not buy an RV.

In the past, I've been a little too occupied with gas mileage. But recently, I've tried to just forget it!! After all, I'm not about to sell my motorhome...so why not just drive and fill the tank when I need to?? Obviously, tracking gas mileage now and then can help check for any engine problems, but if most of us know about how many miles we should get per 1/4 tank of gas. I assumed that when we made the switch to a class A, my gas mileage wouldn't be as good as the Tundra pulling a trailer....and I was right. I've only averaged slightly under 7 mph when pulling the Malibu and traveling an average of 60-65 mph and without the generator running.

Love the comment "It gets good gas mileage for an apartment".LOL!

We have a 2005 Fleetwood Excursion 39S with a Cat C7 towing a Jeep Wrangler. I don't keep fuel records, but I can get at least 6.7mpg - I know I can get 600 miles out of the 100 gal tank. In 2005, the Excursion was the fancier model of the Discovery, probably slightly heavier as it's 6" taller than the Discovery and we always travel with at least a half tank of water.

Bill

Manuf doesn’t matter. Most all gas coaches are built the F53 chassis with the V-10. I would guesstimate the sub 30 footers get 8-10 the 32-37 footers will average 7-8. My buddy’s 36ft Bounder averages 7 with a toad and generator running. So my solo driving with no generator driving of 7.8 seems about right! BTW the 16 and up chassis got the 6sleed auto, my 12 has the 5speed auto. These are V-10 numbers.