Yes, something in that range, at least at highway speed, w/ manual tranny. Stock (4.10s, 29-30" tires) used to get ~22 MPG or so. This was with a somewhat tired engine with clogged exhaust/cat that could hardly hold speed in 5th gear. Guess it just could not burn that much gas.

Then when I did a 3.5" lift, 33s and 5.29s, would get ~20MPG (corrected). And now w/ 4.88s and ~6" lift, I now get more in the 18 MPG range (corrected). If I keep the speed to 55 or lower, I'll get back around 20 MPG.