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HDDAN · 09-24-2010, 09:16 AM

Higher octane gas is to stop detonation. Your SS is designed to run efficiently on 91. Unless it is detonating and the sensors are making the timing retard, there should be absoloutely no difference in horsepower.

09-24-2010, 09:16 AM	#3
HDDAN Drives: 2010 Camaro 1SS 2007 HD FLSTC Join Date: Aug 2009 Location: Boston MA Posts: 1,510	Higher octane gas is to stop detonation. Your SS is designed to run efficiently on 91. Unless it is detonating and the sensors are making the timing retard, there should be absoloutely no difference in horsepower.