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  1. #1

    msx 110/150 oil change

    Used Polaris PS-4 since new, now switching to Mobil 1. Polaris says the only comparable oil is Mobil 1 15w-50 type SJ. Looked all over and have not been able to find it stocked anywhere, my local NAPA carries 15w-50 with an API rating of sm/cf. They called their distirbutor and told me that this oil supercedes the 15w-50 SJ and is the oil I should use. Is this oil safe to use? Or should I continue with the PS-4? Again, thanks for any help


  2. #2
    Rocky_Road's Avatar
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    Quote Originally Posted by alt View Post
    Used Polaris PS-4 since new, now switching to Mobil 1. Polaris says the only comparable oil is Mobil 1 15w-50 type SJ. Looked all over and have not been able to find it stocked anywhere, my local NAPA carries 15w-50 with an API rating of sm/cf. They called their distirbutor and told me that this oil supercedes the 15w-50 SJ and is the oil I should use. Is this oil safe to use? Or should I continue with the PS-4? Again, thanks for any help
    SJ stands for S (spark engine), J (formula generation). Each new, and improved, formula generation receives the next letter. Therefor, API rating SM is three improved formulas above the SJ you were looking for.

    You can always use an API rating letter higher than what is called for...but never use one that precedes what your engine requires.

    Put in the Mobil 1...your engine, and your wallet, will appreciate it!
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  3. #3
    thanks, thought so

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