My four cylinder averages 20 MPG around town, and has hit nearly 21 MPG on numerous occasions. After replacing my distributor and wires, I expect that to go up. I haven't done much highway driving with it, but I expect it to be in the 19-20 MPG range.
My six cylinder has hit 18 MPG around town, but I suspect that it averages about 17 MPG. On the highway, it is consistently 19 MPG.
These are both stock setups. With a 4" lift and 35" tires, you increase the rolling and wind resistance, and MPG goes right out the window.
Minister of Propaganda