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1st Ram, 1st Dodge, 1st Hemi. '22 2500 Tradesman 4wd 6.4L Hemi

FULL CURL

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Seeking fuel mileage improvements so I can actually do some traveling. I already drive like someone that cares about my truck, so habits are not the problem. Are there tuners out there that are specifically for fuel mileage improvements?
 
I have 4.10 axle gears in my 2500 Hemi and I can get 18 mpg on the highway running empty. In my daily commute I get 15 mpg.

Note I have a very easy commute and can run cruise control when on the interstate.

If I am towing the mpgs drop a bunch.
 
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