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Will -
I ran Chevron 91 last year because of my HAI (hot-air-intake => lean-burn => higher octane is better to avoid knocking/pinging). I switched to 87 when the gas prices got too high, didn't notice a change, and never switched back.
I have a hankering to up the octane again because my car is *different* from last year. I also think it has been on 87 for so long that I might be able to detect a difference in the way it drives (big *shrug*).
CarloSW2
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