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  1. #1
    Join Date
    May 2010

    Recommended oil for Carb. 454 mag

    Can anyone recommend a good oil to use for my early 90's 454 mag? Other than the mercruiser 25-40w.

  2. #2
    jjj is offline
    My Boats:
    2016, formula, 270br
    Join Date
    May 2003
    Denver, NC
    straight 40 valvoline racing oil
    castrol gtx 40w

  3. #3
    Neno the mind boggler VIP Member glassdave's Avatar
    My Boats:
    Batboat, 38 Scarab Thunder, 16 Sidewinder, 27 Magnum
    Join Date
    Sep 2001
    toledo oh
    Quote Originally Posted by jjj View Post
    straight 40 valvoline racing oil
    castrol gtx 40w
    we have a Merc service rep in our group and this is what he says as well. I have also been told that the Merc stuff is really the best to run. Gotta watch what oil you use these days so that it has enough zink for non roller cams (at least thats also what I have been told)
    Throttles- Cleveland Construction 377 Talon
    08 OPA Class 1 National Champion
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    08 OPA High Points Champion
    10 OPA Class 1 National Champion ( happy now Ed! )

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