Originally Posted by krnnerdboy
I used nos octane booster(offroad formula only) on my n55 x5 stage 1to boost at race gas levels. The formula is probably good for 3/30 points for octane. I didn't have any detonation on my x5 at those settings.
Be careful with those. Independent testing showed those bottle treatments do not boost octane to anywhere near what is claimed. Like 104 Octane boost only raised 93 to something like 94.5 lol.