Originally Posted by Nuke
There actually IS an economy tune but you'll have to turn in your man-card. Soccer moms will pop you the finger as they pass you. I certainly hope that you didn't buy a Stang for economy. That being said, the typical performance tunes will get equivalent mileage as the stock tune PROVIDED that you're not getting on it a lot (and that's hard to do because even a good custom 87 octane tune will run circles around the stock 87 tune).
+ 1 on the man card! economy = Prius Fun= Mustang and pretty good mileage...as I tell people when they ask what mileage I get with my GT500...I say good enough to get to the next gas station under full boost!