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Re: Re: Regular and Premium octane ratings in your
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Posted by MarkB on April 29, 2004 at 03:07:29 from (64.31.11.211):
In Reply to: Re: Regular and Premium octane ratings in your are posted by Ray,IN on April 28, 2004 at 21:02:24:
You can't compare the Octane numbers from the early seventies to today's ratings. Nor can you compare aviation octane ratings with pump ratings. The number on the pump is an average of the "Research" and "Motor" octane numbers, which are quite a bit different. Before this rating became law, gas stations naturally listed the higher number of the two. Hence the old numbers are much higher than today's ratings.
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