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  1. W

    To change air filter

    What fuel economy we can expect for Duramax 6600? I have bought a used Duramax 660. Current the truck is producing 17-21 mpg when driven empty. That is fine. I am not happy with the power. I guess replacing air filter can resolve this issue. My friend suggested me an airfilter...
  2. W

    Newbie intro

    Hi all, I am Winston