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    duramax 3.0 fuel additive

    The 2021-2023 3 Duramax, as I understand block heater won’t turn on until 0 degrees Fahrenheit. I use Howes regular additive every other tank or maybe less frequently than that. A couple of OTR drivers said to use it once in a while. It’s easy to use, just 6 ounces dies a whole tank.

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