bsinmich wrote:
You will find that length has very little to do with mileage. We started with a '76 Class C 21' for 4.5-5 mpg; next a 27' Class C with 460 in '89 Ford for 6-7; Next 35' Class A '96 Vortec 54 for 7-7.5 and now 8.1 38' Workhorse for 7.5-8mpg. Each one is longer and newer and gets better mileage. Now which power, age, and transmission are you asking about?
x2 - I thought a 30' weighing 16k ould get great mileage. Still 7-9. Wind resistance is the big culprit and no matter how long, the face of an RV still has to push the same amount of air. Frankly I have no idea what my MPG is. I stopped tracking it long ago. I was starting to drive myself nuts. I still plan on taking the same trips so what's the point? Soooo many factors, wind, terrain, how it's loaded, traffic, speed, etc etc. It's really not worth worrying about. When I get asked my MPG, I just tell folks I get good mileage for an apartment.