MPG From My 6.0

04' 2500 HD 4x4 extended cab 6.0 12,500 miles. Took my first road trip since new. 14.71mpg @ 70mph w/ac. I thought that was pretty damn good. Is that good or should it be better?

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i would say not too bad. i have a 98 suburban with a 5.7 and can get 22 at 55 mph, and drops to 15-16 when pushing it at 70-75 mph with air.

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