My new motor has 2500 miles on it and I only get 220 miles to a tank. My old motor would get 260-270. WTF?? It has new plugs but the same wires. What in the hell could be wrong?? It is not a heavy foot b/c I drive it just like I did w/ the old one. Any suggestions?? I have heard of some of you getting 300+ w/ the same mods and driving it hard?? What gives??? I do all city driving.