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    Typical DEF Usage

    I have a 2019 2500 Longhorn and just got the TSB flashed and I dont see any real improvement. I used an 1/8 of a tank just doing some light freeway driving. I'm getting about 350-425 mpg on the def. My 2014 2500 got 5000-8000 on a tank. Going to monitor it more to see how it is.
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