RAM 3500 CC LB 4x4 6.4 hemi fuel mileage
3:73 gears, 500 mile trip not towing I got 16.2 mpg. Twice as good as my last gasser it was a Ford 460 it never passed a gas station lol
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I doubt the cummins would get much better.
At a steady 65 mph my Cummins consistently gets 20-21.5 mpg. But where the diesel really shines is when towing. Gassers just don't get the mileage and the 6.4 with its cylinder deactivation that works nice when not towing is often never able to be used when under a load.
