its not all about the octane of the fuel that makes the difference , yes extra octane may hurt power a bit if its just too high,,,,From what I understand, the higher the octane, the more detonation resistant the gas is. So lower octane detonates easier. You want to run the lowest octane you can without pre detonating. Any higher of an octane and your just throwing money away. I don't see how the higher octane will give better throttle response and more rwhp if its not needed. I don't know, maybe you know something about gas that I don't.