I have owned a 2000 and 2003 Excursion, both 6.8s, both 2WD 3.73 ratio gears. Driving 75 on the highway, I would get about 16 mpg; around town, 12 to 13. Towing 4 tons, I got 8 mpg pretty consistently. I did meet a fellow once with the 4.10 gear in his Exxcursion - he got around 11 mpg. I wish I had purchased a diesel Excursion, but they were just too much money for me to part with. I really enjoyed my 2nd X, an Eddie Bauer. Good luck with your search!!