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Wills6_4_Hemi's avatar
Jan 16, 2017

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
  • 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.
  • 23 is the best highway mileage I have ever gotten with the 6.4 in my Challenger but I have never gone through a tank of fuel at freeway speeds without at least a little um, "playing".
    Great sounding engines aren't they?!
  • FishOnOne wrote:
    Not too shabby... I doubt the cummins would get much better.


    Non-freeway road trips with speeds at 65 and under I get 23+. Not the norm for me but I don't usually drive 55-65 for long distances not towing. When I do that's a consistent result, however - in Idaho, with elevation and mountains. Winter mileage isn't that good.
  • mowin wrote:
    Depending on speed, I get 18 hand calculated. Anything over 68 mph, it starts to drop quick.
    BTW mine is DRW is yours?
  • mowin wrote:
    Depending on speed, I get 18 hand calculated. Anything over 68 mph, it starts to drop quick.
    I must admit that speeds varied from 60-75 mph or I may have done better. But i am happy so far and after 3000 miles I like this truck more and more.
  • Depending on speed, I get 18 hand calculated. Anything over 68 mph, it starts to drop quick.