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Octane, 87 ain't cutting it!

29449 Views 72 Replies 39 Participants Last post by  synchronizeswimr300
The last tank I got of NJ's best crapola 87 fuel is giving me a sizzeling sound under load between 5-6k RPMs. Bumped it up to 93 octane tonight. Temps around 40f, will now be colder, low 20s.

Fingers crossed the super cures it.

Anyone else notice preignition/detonation signs/sounds?
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