 5.4 eng+4spd auto+4WD+4.10 lim slip axle= poor gas mileage,lucky to get 14mpg highway w/no load or trailer in tow.Another review reported getting 20+mpg highway with essentially the same set-up.They must drive downhill w/50 mph tailwinds all the time to get 20+mpg or they're dreaming.Poor gas mileage aside,it's a great truck.Wish it had the adjustable pedals.