2.5" lift 33X11.5 tires, bumber, winch, K&N intake, superchip on towing tune with a 6 speed. If I don't speed or try to pass other cars (if I can even get up the speed to do it) and keep it running between 2000 and 3000 rpm, and run 40 PSI I average 16.
I filled up with non-ethanol 92 octane the other day, and the computer is telling me I am getting 17 with mixed highway and small rural roads (tight corners, steep hills, gravel) Don't know about city mileage, ours is only 4 blocks long so it is hard to get a good idead from that.