Last trip, 70mph and 20.2mpg calculated. DIC read 21.3(inaccurate). That is running stock tires/wheels. 
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08 Chevy 2500HD LMM Crew Cab SWB 4x4
305/55r20 on Diamo 8-Karat
5" MBRP turbo back and EFI Live V2
big THANKS to MEYER PERFORMANCE
I-45 Racing
Texas A&M class of 07
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