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S50 engine oil. What's your choice?

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  • #16
    Looking to get my S50 her annual oil service and found this thread on recommended oils. Seems as though there's no definitive answer!

    5W/40 fully synthetic the way foward and if so what about brand? Opie seem to have some good deals on Motul, Gulf and Fuchs.
    S50 M Coupe

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    • #17
      Originally posted by Dave P View Post
      Have BMW ever officially said you can use 10/60 in the S50 ? I know many dealers use it.
      I still have my unopened 10/60 top up bottle- which I got from dealer when I had my M3evo about 12 years ago----- I assume oil does not deteriorate after 12 years????
      sigpic///MCoupe S50 Estoril

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      • #18
        Originally posted by v8rumbler View Post
        I still have my unopened 10/60 top up bottle- which I got from dealer when I had my M3evo about 12 years ago----- I assume oil does not deteriorate after 12 years????
        I don't think they have a best before date on the bottle but I wouldn't chance it after 12 years?

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        • #19
          Ah, something I can finally advise on - I did organic chemistry at University all those years ago.

          The shelf life of oil really isn't something that is definitive as there are so many competing factors dictating the stability of the oil, such as whether it has been opened or not, where it has been stored, the temperature, the additives within amongst other things.

          I wouldn't suggest using that oil, not only because it is 12 years old but also because it's the wrong grade;)

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