well its been 5 days since i had my gears and i only see a difference whenever i go on the freeway (probably like 1-2mpg drop). In the city im getting about the same or even better 
__________________ 1995 3.9L V6 Mustang (auto)
Mods: 8.8 rearend w/3.73 gears, Engine Bored 0.030 Over, Ported Heads, JEGS Exhaust Cutouts, DEI Exhaust Wrap, BBK 56mm TB, Aluminum Driveshaft, VAP 1/2" IMS, 180 Degree Thermostat, SCT XCal 3 Tuner, Ported UIM, BBK UDP, Aftermarket CAI, Pypes 2.5" Dual Exhaust w/o Cats, Pypes Street Pro Mufflers Dumped, Screamin Demon Ignition Coil, 8.5mm Livewire Spark Plug Wires |