Quote:
Originally Posted by IrocJack
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Nothing on that Web page contradicts what is being said in this thread by GretchenGotGrowl/SC2150 and others.
The explanation of what octane does (reduce detonation/knock) is right in line with what they're saying. Any increase in power/MPG is because the ECM doesn't have to adjust for detonation by pulling timing, resulting in more efficient combustion with the higher octane fuels.