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LS3 here also I only average 14 mpg. I do a lot of driving around town not really much on the highways but still that seems low to me what do u guys thing? I keep it under 4000 RPMs still because I only have 777 miles on it. I do my shifting around 3000. could that be why?
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1SS CYBER GRAY METALLIC, RS PACKAGE, PREMIUM SOUND UPGRADE
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