I understand that owning my Jeep means bad gas mileage but after talking to a bunch of people something just isn't right. I get about 10mpg in my 89 Wrangler, here are the specs, 32" BFG MT's, Chevy 350(bone stock), fuel supplied by a Edelbrock Quadrajet topped with a 14x3 K&N,Heddman headers with 2 1/4" dual exhaust with flowmaster mufflers,flex-a-lite electric fan, a Turbo 350 tranny(built with heavy duty clutch packs), stock transfer case(NP231) and stock axles front and rear(d30 front and 35 rear) with stock gears, 3.05 I believe...not sure. Anyway my old 258 got horrible gas mileage and I had everything checked on it and was in the shop many times and they couldn't find the problem. I installed a Weber Carb and it made NO difference. So finally I went with a Chevy 350. Like I said I know not to expect great gas mileage but I know people with Suburbans that have a 350 and they get better gas mileage than me??? The only thing that is left from the old engine is the radiator, how could this affect gas mileage?? Even if I could get the number up to around 12 to 13mpg that would be fine with me. One thing that I have noticed is that the engine runs VERY cool. On my temp gauge(which I know for a fact works correctly) the engine barely gets up over 2nd dash on the stock YJ gauge. So I am guessing that engine runs at about 150-160, that seems a little cool to me. Anyone got any suggestions????? I am stumped.