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which oil to use?

This is a discussion on which oil to use? within the Firebird / WS6 forums, part of the Vehicle Specific category; Anyone run M1 0W-40 or have any experience with it?? I thought I remember some guys saying it worked well ...

  1. #41
    The Bandit Wesman's Avatar
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    SGM
    1998 Trans Am WS6

    Anyone run M1 0W-40 or have any experience with it??

    I thought I remember some guys saying it worked well in our engines.

    I'm currently running M1 5W-30, but it doesn't seem optimal. It still uses some oil, and valvetrain noise is very apparent at idle, which I don't like. Seems like it needs a thicker oil.

  2. #42
    Senior Member INMY01TA's Avatar
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    Black
    2001 Trans Am (sold)

    OW40 is the only M1 I would use in my LS1.

  3. #43
    Member stanger88's Avatar
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    Black on black.
    2001 WS6 M6 (stock)

    Quote Originally Posted by INMY01TA View Post
    OW40 is the only M1 I would use in my LS1.
    It is a decent alternative. The 30 weight M1's are horrid though.

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