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kendall mckee

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  1. kendall mckee
    Hi. I have the same concern with my 2019 duramax. Oil black as coal with consistency of water. The reason I'm having trouble believing this is just normal is I also have a 2001 lb7 with 330k and after 9000 mi on a oil change the oil still looks like it did when I poured it out of the jug. ?
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