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  1. #1
    h2jim's Avatar
    Join Date
    Nov 2008
    Ontario Canada

    synthetic oil vs mineral

    I found a couple of oils. Both are 10W - 40 and for 4 stroke engines. Both are JASMO MA certified. One is full synthetic and the other is mineral. What is the difference other than the price? Is mineral oil safe in our engines?

  2. #2
    800AMSOIL4U's Avatar
    Join Date
    Aug 2006
    Morgan Hill, CA
    Yes you can use a JASO MA oil that is mineral or synthetic. If you can find a JASO MA1 or a MA2 is even better. The synthetics will not break down as fast and run cooler that the petroleum oil.

    You can run the AMSOIL 10-40 Synthetic Marine Oil. It is safe for the supercharger clutches.

    Here is a test regarding the Sea-Doo and the AMSOIL Synthetic for the supercharger wet clutches. This was their old formulation.

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