Seems as if every MH out there gets about 6-10 MPG. Oh sure, there are those Sprinter diesels, but that is an exception. Anything on a truck chassis that has more than 20K pounds is going to get in that range.
Bigger coaches have more engine,which helps it get down the road more efficiently, but still uses that 7-8 mpgs and the smaller ones have smaller engines, which have to work harder.....
Diesel will usually get better mileage than the gasser, but gas is less expensive than diesel right now, so it may cost more to drive the diesel, even with better mileage
Don't worry to much about it.....figure about 5 mpgs on your trip calculations, and you'll be fine.....even have a few bucks left over at the end.
Bill & Claudia / DD Jenn / DS Chris / GS MJ Dogs: Sophie, Abby, Brandy, Kahlie, Annie, Maggie, Tugger & Beau RIP: Cookie, Foxy & Gidget @ Rainbow Bridge.
2000 Winnebago "Minnie" 31C, Ford V-10
Purchased April 2008 FMCA# F407293 The Pets
Cummins 5.9L with Banks Stinger (290hp according to Banks) and we have averaged 10.5mpg over the last 800 miles towing a 2004 Kia Optima on a dolly. Most of it in the PNW going into the Cascades cross country skiing. Generally about 60mph speed (2200 RPM). Would probably get a little better with a 6-speed Allison but we have the 4-speed.
When we bought our MH my DW asked the same question as were were getting an avg of 8.6 mpg over 40,000 miles of towing our TT with a Toyota tundra and before that a Jeep GC. It was interesting that no matter what TV or TT we had it always avg ~8.5. My comment to her was if the MH got roughly the same MPG I would be content.
So far the avg has been 8.6 over 3,000 miles and according to the silverleaf the MH has avg 8.6 since it was new 53,000 miles ago.
Reckon that's a pretty good budget point. I can boost that to 10ish by slowing down to 55 if I so choose.
2000 40" DP Beaver Patriot Thunder Cat C-12 425 HP, 1550 Tq
1997 Jeep GC Limited ---toad
2008 Toyota Tundra Crew Max Limited TRD (Retired)
2009 Cougar 268 RLS ~8700 lbs road wt (Retrired)
2006 Jeep Liberty Turbo Diesel.....TV in Training
I've heard other people say "If you have to worry about mileage you don't belong in a motor home"...food for thought...IMHO, of course
I've heard other people make that same comment and I think to myself they are very stupid for verbalizing that. Just because someone asks a MPG question doesn't mean they are "worried". Further, everyone should know exactly what economy their RV returns as a variation might mean a problem is brewing.