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Thread: What grade oil to use in a 540iA?

  1. #1
    Join Date
    Jan 2006
    Posts
    16

    Default What grade oil to use in a 540iA?

    I have no clue what the previous owner had been using. I live in Seattle and the car has 123k miles.

    What grade would you suggest?

    Also, did these cars come from the factory with synthetic or dino juice? I'd hate to start putting in synthetic only to start developing leaks due to sludge being washed out of seals.

    Thanks all.

  2. #2
    Join Date
    Feb 2004
    Posts
    4,894

    Default

    Just put in synthetic... 0W40, 5W40 or 5W30 is all good.

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