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Old 05-26-2009, 02:51 PM   #11
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The reasons behind using 91+ octane versus 87-89 is to keep from causing damage to the engine.

Predetonation is a killer to these engines, when you run low octane fuel you have the potential of predetonation because more octane makes the fuel harder to burn. This is probably ok as long as you don't go over say 1/3 throttle.

Your pcm will also learn the constant knock retardation occurring causing it to use the low octane table. This is an attempt to reduce the timing to stop predetonation. In reality it causes less power and possibly uses more fuel than if you used premium.
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Old 05-26-2009, 08:08 PM   #12
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i use 93 octane, whats the difference between 91 octane and 93 octane?
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Old 05-26-2009, 10:44 PM   #13
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Quote:
Originally Posted by ricosuave420 View Post
i use 93 octane, whats the difference between 91 octane and 93 octane?
1 octane

Everything you couod ever want to know about octane rating is here Octane rating - Wikipedia, the free encyclopedia
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Old 06-08-2009, 02:45 AM   #14
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I also use the good gas for my car. I find it more reliable and i also get better gas milage. but i never really didnt ride smoth with out it
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Old 06-08-2009, 11:44 AM   #15
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