2002 f-250 7.3, supercab shortbed, 6 spd, 4wd, 4in lift an 35's, custom tuned ts chip, 4" turbo back exhaust, 6637 intake, yada yada other goodies. IF i'm fairly easy on the gas, driving around 50/50 hwy/city, and 65-70 mph tops, I get 18 mpg. On longer hauls, up to 20 mpg.