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Old 11-16-2004, 10:26 PM
Duke2.6 Duke2.6 is offline
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Join Date: Mar 2003
Location: Southern California
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Make a difference regarding...?

The "premium fuel burns faster" myth probably originates from not understanding the nuances of combustion and the difference between normal and abnormal combustion.

If you use fuel with insufficient octane in an engine and it detonates then, yes,combustion is "faster" because detonation is virtually instantaneous, but this is ABNORMAL combustion, and most engines will not survive long under continuous detonation, so the point is somewhat mute.

If you use a higher octane than the engine needs, there is no signficant difference in normal combustion flame propagation rate, and there would be no statistically signficant difference in emissions. If the octane rating is too low and the engine detonates, then it's a whole other ballgame.

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