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Old 09-02-2015, 05:05 PM   #6
its a syn
B.O.D. 02/16/10
 
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Drives: 2010 SGM Sp. Edition 2017 RS Conver
Join Date: Jun 2010
Location: Albia,Iowa
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I can't tell for sure but the 6.2 has a 3.08 rear axel ratio and the 5.3 has the 3.42. That would make them similar in MPG.
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