Quote:
Originally Posted by chuckd05
my car definatly behaves better when i have some 100 in the tank.. no doubt about it
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psychological effect. Octane is a chemical added which makes the fuel harder to burn. This prevents pre-combustion, or knock, which can help engines that are either old and have carbon build up which causes hot spots, or modified high comression engines (pressure+temperature causes ignition), or engines that run extremely hot due to very high power output. Your brand new stock engine will not knock on premium fuel, unless it's 140F outside, therefore your engine will not advance the spark, which will not reduce the power output. Fact. Ask an engine engineer. Oh yeah, I am one. That's your answer.