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Old 08-10-2007, 01:54 PM   #17
Gadzooks Mike
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Join Date: Jan 2007
Location: Opelika, AL
Posts: 162
From what I understand, the higher the octane, the less energy, so worse mileage would make sense. So far, results seem to be mixed as far as performance goes. Several found no difference, one or two found smoother running.
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