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MMC · 06-22-2012, 05:08 AM

The higher Octane in the premium will keep the car from pulling timing to prevent knock, but as far as how much that improves performance all depends on a lot of variables. Try it and see what you think, is it worth it?

06-22-2012, 05:08 AM	#10
MMC Drives: CGM 2SS/RS, 1987 & 2014 Silverado Join Date: Oct 2010 Location: Spencerport, NY Posts: 1,012	The higher Octane in the premium will keep the car from pulling timing to prevent knock, but as far as how much that improves performance all depends on a lot of variables. Try it and see what you think, is it worth it? __________________