2007 Chevy 2500HD Crew mileage
Hi every one. I just completed a 567 mile round trip and the mileage was around 7.4 mpg. Empty around town or highway, im seeing 11 mpg. I'm starting to wonder if new plugs and wires are in...
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By my sig, an 8.1/Allison and I will get 6-8 with our 5th wheel and empty can vary at about 13-15..... I drive by the tach, about 2000 rpm.
