Picked up 2009 Itasca Cambia in Minnesota and drove back to California. Brought my scan gauge with me and got as high as 12 and as low a 6. used cruise control
and sometimes not. i found that 62mph was the sweet spot and usually around 9mpg.That was flat and steady with occasional hills it dropped quickly as speed
increased. At 55 -62 was the best. Checked it both by hand and the scan gauge. I just fill up and drive. If I was concerned about mileage I wouldn't have purchased
this coach. I watch my BIL fill his diesel pusher and I feel better.
Usually I top off and it's around 125 bucks or so, i think about the crappy hotel rooms I stayed in for that and i smile....