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fbm3cab · 09-22-2014, 07:21 PM

Here in western Canada I've been running Shell premium 91 octane but filled up with Chevron 94 octane (no ethanol) and the engine is noticeably stronger. makes me wonder if the Shell premium was even at 91 octane.

09-22-2014, 07:21 PM	#7
fbm3cab Second Lieutenant 35 Rep 221 Posts Drives: M3 Join Date: Aug 2013 Location: B.C. Canada iTrader: (0)	Here in western Canada I've been running Shell premium 91 octane but filled up with Chevron 94 octane (no ethanol) and the engine is noticeably stronger. makes me wonder if the Shell premium was even at 91 octane.
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