I have a brand new '04 Double Cab 4x4 (V-6, auto) and I average 20mpg, but I have a 28 mile (one-way) freeway commute every day. Then there's running around town and that sort of stuff. I got 22mpg on a 700 mile road trip, with my quad in the back and a couple hundred pounds of gear. Not too bad for 4wd, I guess. I try not to hot-rod it around too much (not like the truck is really fast, anyway!).