10-26-2012, 07:44 PM
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#31 (permalink)
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Track Member
Join Date: May 2011
Location: Covington, LA
Posts: 956
Drives: 011 370 BSM/T/SP/6MT
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Quote:
Originally Posted by Z370Z011
Does 93 make a difference?
I guess i can see it on a boosted car, but on a NA, would it improve milage or HP??
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The higher the Octane Rating, the less "knocK" you get (ie premature detonation of the gas in the cylinder prior to the spark plug firing - ie pre-ignition). As the computer detects these pre-ignitions, it starts to retard the timing to compensate. This robs the engine of Horsepower. So, in effect, the higher the octane rating, the more Horsepower you retain as you get less knock. This translates to better response, and better gas mileage.
That's about it in a nutshell.
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