MPG...Confusion

[Smokedawg]

Back when I purchased my 5.0 I was getting decent gas milage. Indianapolis is one way approx 35 to 40 miles.. I could make roughly 3 trips there and back on a tank of gas. Well after about 5 months something just went bad. I have no idea what could have caused this but for some reason my gas milage started dropping significantly. Now it would only get one trip there and back and had to fill up as soon as I got back to town. So thats like only about 90 miles on a full tank. Now after my mods I dont drive it enough to have to fill it up very often but I was just curious if anyone else has had that problem and what causes it.

------------------
347 Stroker Motor: Balanced, 30lb Bosch Injectors, Cobra Computer, Cobra Transmission, Extude Ported and Polished Upper and Lower, GT40 Milled Ported and Polished Heads, B303 Cam, BBK 1 5/8 Headers, March Underdrive Pulleys, Electric Fan, Accel Performance Coil, Accel 300+ Racing Wires, NGK Plugs, Ram Air, K&N Filter, 79mm Mass Air Unit, FlowMaster Exhaust w/offroad H-Pipe, Hurst Short Throw Shifter, 3:55 Gears, Ram Clutch, Cross Drilled Rotors, High Tolerant Painted Calipers and Drums.