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tjohnson · 12-19-2019, 06:18 PM

Since it was brought up, I'm curious which fuel is better for a tuned car?? I have access to pure 91 octane premium OR 91 octane with 10% ethanol.

I'm guessing the ethanol mix would be slightly better, but the "pure" 91 is always more expensive. LOL

12-19-2019, 06:18 PM	#11
tjohnson Private First Class 131 Rep 127 Posts Drives: 2024 iX50 Join Date: Oct 2011 Location: Idaho iTrader: (0) Garage List 2024 BMW iX50 [0.00]	Since it was brought up, I'm curious which fuel is better for a tuned car?? I have access to pure 91 octane premium OR 91 octane with 10% ethanol. I'm guessing the ethanol mix would be slightly better, but the "pure" 91 is always more expensive. LOL
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