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Old 06-16-2012, 05:43 PM   #4 (permalink)
ksa8907
Master EcoModder
 
Join Date: May 2012
Location: Tampa, FL
Posts: 1,745

Volt, gas only - '12 Chevrolet Volt Premium
90 day: 38.02 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.26 mpg (US)

Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid
90 day: 21.48 mpg (US)
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the biggest factor for mileage is pressure, the higher you can keep the pressure the better, safely of course. LRR tires are great, but dont be fooled!! some tires will sacrifice traction for rolling resistance, do your homework extensively. personally, i would keep the size that is stock. also, i've heard great things about the michelin energy saver a/s tires.
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