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Old 11-06-2007, 07:00 AM   #2
maxwedge
A990 racer
 
Join Date: Mar 2002
Location: Chestertown, New York
Posts: 17,050
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Re: RPD's verses MPG; 99 Sierra

Welcome to AF. Impossible for fuel quality to change engine rpms, which is a function of tire size, speed and gearing.
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