What octane is everyone running on their cars? I know the minimum is 87 octane, with 91 recommended and 93 recommended for M cars.

I’ve ran 87, 89, and 93 octane and have felt no performance difference. Also, I don’t hear any knocking on any octane thanks to the knock sensors.

Car is a g20 m340i with a b58.

  • kon---B
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    1 year ago

    FYI, on the inside of your fuel door you’ll find AKI 93.

    The engine will muster on lower octane fuel but, it’s a high compression engine that does best higher octane gasolines.