BMW 3-Series (E90 E92) Forum - View Single Post

Armen52 · 05-15-2005, 09:29 PM

What octane is Shell Optimax? I was under the impression that the engine should run well on 91 octane or higher.

It should even run on lower octane if necessary. It should just tune down the compression ratio to avoid knock and lose some power.

05-15-2005, 09:29 PM	#7
Armen52 Captain 33 Rep 663 Posts Drives: 2006 330i Join Date: Apr 2005 Location: Los Angeles, CA iTrader: (0) Garage List 2006 330i [0.00]	What octane is Shell Optimax? I was under the impression that the engine should run well on 91 octane or higher. It should even run on lower octane if necessary. It should just tune down the compression ratio to avoid knock and lose some power.
	Appreciate 0 Quote