Anyone have some real numbers regarding gas mileage before and after tune. When looking at the ford racing tune that supposedly offers the tourque at about 1500 rpm it seems like that is right in the sweet spot that would be helpful for city driving. The 45 and 50 mile zones around me seem to fall right in that rpm range in 5th and 6th, but sometimes I feel like I,m driving at to low of rpm. This of course brings up another question. Do you guys think its ok to cruise at at or below 1500 rpm.