2010 Mirada 35DS with V10. We weigh right at 20,000 lbs on the grain elevator scale and I set the cruise control @ 65 mph on the interstate. I don't tow a toad. I keep a log of gas and mileage. Over the last 12,000 miles we have gotten 6.77 mpg. We do use the generator a fair amount and if I deduct out estimated generator usage, I'd guess we are right at 7 mpg just for travel.