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Old 05-16-2002, 06:08 PM   #1
blue00gt
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Higher octane gas will take higher temperature/pressure before it combusts than lower octane. That's why you need it for forced induction, advanced timing, or high compression; it prevents pre-ignition, which is when the explosion happens before the spark plug fires because of high pressures and temperatures. I can't really see how it would hurt anything to use higher octane gas, and it doesn't make much sense that it would make knocking/pinging worse. It's just a waste of money if you don't need it.
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