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Old 05-21-2012, 02:54 PM   #55
K1SSRSS
Chief Many Camaros
 
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Drives: A paid off Camaro!!!
Join Date: Mar 2009
Location: Las Cruces, NM
Posts: 1,424
Hey guys, I am also looking at going with 3.91s with a M6, would you suspect the extra 250 rpms at 80mph in 6th gear would affect the highway mpg much? I would think the lower gears would actually increase the mpg around town due to less strain on the motor, but I am concerned with the highway mpg because I drive the camaro long distances more frequently than around town.
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