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blue2000s · 11-09-2012, 02:00 PM

93 octane fuel tests at (and is rated at) 91 octane at high altitude. I assume you're well over sea level in your part of Utah. You don't need any octane booster.

11-09-2012, 02:00 PM	#3
blue2000s Porscheectomy Join Date: Mar 2006 Location: Seattle Area Posts: 3,011	93 octane fuel tests at (and is rated at) 91 octane at high altitude. I assume you're well over sea level in your part of Utah. You don't need any octane booster.