for ours cars it won't make a squat of difference... the computer would just not allow the kind of timing required to make a difference with it in the tank...

for your local daily driven 500 hp evo... thats what would be in his tank on race days.

we fill my neighbors SRT-4 up with 102 sunoco race gas which is sold near the George Washington Bridge on the way in to New York City before we head out to the track so that we can run a tad more boost before it starts pinging... our SRT-4 does not need it yet no matter if its a track day or not...