[jrichard]

that's exactly what hi-octane fuel is supposed to do- prevent detonation in high-compression engines. octane actually makes the fuel burn SLOWER instead of exploding. Since detonation (exploding fuel) can destroy engines, it's almost always best to run slightly higher octane numbers than your engine is designed for, especially if your timing is advanced, as in most hi-po engines. besides, what's a few cents per tank to save your engine? do boosters work? yes. and they certainly don't hurt anything. I never use ANYTHING but 93 in my cars and motorcycles.