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Originally Posted by Echoi17
So if this is the case, then what you are saying is that it is true that higher octane doesn't do anyhting for us unless we re-tune our cars for the higher octane. If so, then is there a difference for us between 87 octane and 91 since we can't really take advantage of the the octane difference?
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I can't remember what our cars are tuned for. I just get supreme no matter what, and I believe supreme here is 93.
If I decided to jump to around 100 or something, it won't do jack for my car, because it's not tuned to advance the timings for that.