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  1. #1

    Default Crusader 270hp carberated engine. Recommended oil

    Taking a survey. I boat in Maryland and use mercruiser straight 40 weight oil. What are other people using in there engines in md and out side of md. What is recommended for small block 270hp engines. Thanks mike

  2. #2
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    7,948

    Default Re: Crusader 270hp carberated engine. Recommended oil

    15w-50 mobil 1 full synthetic in the BBCs

  3. #3
    Join Date
    Nov 2012
    Location
    South of Boston
    Posts
    88

    Default Re: Crusader 270hp carberated engine. Recommended oil

    Quote Originally Posted by makomark View Post
    15w-50 mobil 1 full synthetic in the BBCs

    If an older flat tappet engine the oil should contain ZDDP to protect the camshaft lobes.

  4. #4
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    7,948

    Default Re: Crusader 270hp carberated engine. Recommended oil

    Quote Originally Posted by hottoddie View Post
    If an older flat tappet engine the oil should contain ZDDP to protect the camshaft lobes.
    and there is plenty of zinc in the M1 full synthetics....

  5. #5
    Join Date
    Nov 2006
    Location
    lakewood, ca, usa
    Posts
    358

    Default Re: Crusader 270hp carberated engine. Recommended oil

    Shell Rotella 15w40 plus one bottle of Lucas Zinc additive if standard hydraulic lifter engine.

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