Has anyone tried using an octane boost when filling up there cars?? I'm headed to a track on wednesday, and I was thinking about using it, but I'm afraid that it might set off some sensors. Has anyone used it?? did it feel different or should I just not bother?

 

Reading your list of mods, you haven't done anything to your engine that would require you to use an octane booster. Just keep using the octane grade that the engine was designed to receive (91) and save your money.

 

I've tried it, 107+ additive to 91, couldn't tell a difference. Definately not the same as high octane race fuel. No sensor problems either.