Sunroof you sound like me.My 65 with the 440 gets about 3 MPG.That Dominator sure likes to suck gas.My thought is if you can afford a Hemi you can afford the gas.Worst part is with the 12.5 pistons I have to run at least 1/2 110 octane at over 5 bucks a gallon.But I didnt build it to see how much MPG I could get just HP.Rocky