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Scottj,,,,,,very interesting! I wonder if it has to do with being able to hold better more accurate clearances under the high rpm/stress of big horse power?
As for NASCAR gasoline, I thought they were running "pump" gas, not "racing" gas? I don't know about the mainland but there is NO place you can buy "pump gas" here that is over 101 octane. I heard a "rumor" that you could buy 101, but I've never seen it! 94 is about tops.
Ernie
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