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  1. #1

    Default Best oil for cummins

    What is the best Rotella oil for my twin 370 cummins marine diesels?

  2. #2
    Join Date
    Oct 2012
    Location
    sacramento, ca.
    Posts
    306

    Default Re: Best oil for cummins

    the serious commercial guys use chevron delo 400
    *** In comparing the virtues of various calibers, using hollow point ammo: it is absolutely undeniable that, while a 9 mm or .40 S&W may or may not expand, a .45 will never shrink. ***

  3. #3
    Join Date
    Sep 2015
    Location
    CA
    Posts
    74

    Default Re: Best oil for cummins

    15W-40 delo 400 if you're still wondering lol

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