I think that is the truest thing I have read on here, I think some of the folks on here quote the best they have ever seen as the average. I can guarantee you the only way a 2000 4X4 dodge with 37's on it is going to get 25mpg pullin a boat or empty is if its with the clutch in and rolling down hill.

Also my uncle used to tell me his '04 5.9 cummins got 15 pullin his 30 foot camper, but that was with half a tank pullin and the other half empty ridin round town, you gotta figure your stuff right.

matt