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Message: <blockquote data-quote="Rapid" data-source="post: 19069" data-attributes="member: 6575"><p>The manual says to use top tier 87 octane gasoline. No more than a E15 gasoline. No E30 or E85. Also says to use a AC Delco fuel system plus cleaner if top tier gasoline isn't available. Says to add the cleaner to the gas tank at every oil change. E15 has a 88 octane which wouldn't be 91 octane like premium in the State of Iowa. I just wondered if a higher octane would wake it up a little being turbocharged.</p></blockquote><p></p>