I have the 4.0L 3spd auto. 16 to 17 mpg all the time, city or highway, A/C on or off doesn't matter. when I pull my 6'x8' camping gear trailer, I get about 15mpg. It's still better than my old Nissan hardbody 4x4 truck, down hill with a tailwind and the tailgate down it got 12mpg on the highway, intown 9-10mpg. it had 34x11.50x15s & a 4" lift on it.