I have a 95 gt mustang, with just bolt ons. To be exact, 4:10 gears, bbk cai, bbk 70mm tb, Mac cat back. Those are the only Real performance mods I have that would affect gas mileage and my car is doing horrible. The car runs great, it doesn't miss a beat. The exhaust has a nice clean smell to it and no black smoke. Yet I find myself filling my gas tank up after 100-115miles and I always refill when its at 1/4 a tank. I never let it go below that. What could be making my car do so horrible with gas? I mean I know the gears do a good part, but most of the time I always short shift. So Im lost. Any ideas?