Thread: The truth about Regular, Plus and Super gasoline.
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Old 03-10-2010, 05:32 PM   #11 (permalink)
kannibul
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Originally Posted by j.arnaldo View Post
Is it true that the ECU will advance (or the viceversa, if appropriate), when the octane rating varies, to compensate for the lack of power in the combustion process? Thanks, zmyride! Finally, would downgrading to 87 octanes hurt my 3.5L engine--not that I'm planning on doing it, but...
ECU will not advance for more octane. Only retard for low octane to (hopefully) safeguard the engine from detonation.
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