2005, 6 speed, 108k, stock 4.0L, 32 inch tires, 3.73 gears, new exhaust (3 cats, 4 O2 sensors, no CEL’s ever), new fuel pump, new spark plugs. With 90% City\10% Highway, I consistently get between 14.5-15mpg. Pretty much exactly what the Moroney sticker says and what fueleconomy.gov predicts for City driving. I would love to see what I would get with highway driving, but since I didn’t buy the TJ for taking long trips, I doubt this test will be happening any time soon. I take our more comfortable JK on long trips and still get crappy mileage numbers, LOL.
P.S. if you have larger tires and didn’t correct your speedo, your odometer won’t be accurate, and your calculations will be off (i.e. your real mpg will be higher than calculated, unless you compensate for the tire size difference in the calculation). Just wanted to throw that out there since some forget about this, especially if they bought a Jeep with larger tires and never checked to see of the speedo was “healed”.