M5POST - BMW M5 Forum - View Single Post - High octane with +- 10% ethanol or no ethanol gas?

FrankL · 03-04-2026, 01:45 PM

So what gas and octane do you put in your BMW? I have a Marathon station close by and they sell a 90 octane no ethanol gas. I have been using 89 or 91 octane from usually Shell station.

03-04-2026, 01:45 PM	#1
FrankL Private 179 Rep 68 Posts Drives: 2018 BMW X5, 2014 320i Join Date: Feb 2026 Location: Vero Beach, FL iTrader: (0)	High octane with +- 10% ethanol or no ethanol gas? So what gas and octane do you put in your BMW? I have a Marathon station close by and they sell a 90 octane no ethanol gas. I have been using 89 or 91 octane from usually Shell station.
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