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Thread: F/I engine oil weight choice?

  1. #1
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    F/I engine oil weight choice?

    I don't want to get into a discussion of oil brands. What oil weight are you using in your forced induction engine?

    I have an E36 M3 with stage II AA Twinscrew supercharger daily driver, no track time. I am thinking either 0w-40 or 5w-50...the 0w-40 is what is recommended for the stock engine, is that sufficient or should a F/I engine use different weight oil than a N/A engine?

    Looking forward to what others have to say.


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  2. #2
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  3. #3
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    Quote Originally Posted by Butters Stoch View Post
    M1 0-40 euro spec
    Aka the unicorn tesrs oil. Down there do you guys have bigger than the qt bottles there in stores?

  4. #4
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    Quote Originally Posted by e30kid89 View Post

    Aka the unicorn tesrs oil. Down there do you guys have bigger than the qt bottles there in stores?
    We can get 5qt jugs. I think even walmart carries it.
    1996 332IS
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  5. #5
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    m3mods is offline Boost Addict BMW CCA Member
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    How many miles are on your motor and what are the current temps (highs and lows)?

    - - - Updated - - -

    Ambient temps that is..

  6. #6
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    40w under 40deg. 50 over it. Adjust your lower number to your average LOWEST temp. In EC, MD, I'd run 10-40 in winter/late fall, 15-50 late spring/early fall. Just take it easy until the oil warms up....thoroughly.

    Don

  7. #7
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    Quote Originally Posted by dcvee View Post
    40w under 40deg. 50 over it. Adjust your lower number to your average LOWEST temp. In EC, MD, I'd run 10-40 in winter/late fall, 15-50 late spring/early fall. Just take it easy until the oil warms up....thoroughly.

    Don
    That's about what I was going to recommend as well unless it is a fully rebuilt from the ground up motor (which I am assuming its not) in which case I would go with a bit lighter weight.

  8. #8
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    I would go with the lightest weight oil that gets you good oil pressure under your operating conditions.

  9. #9
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    Liqui Moly 10w-60

  10. #10
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    Liqui 5W-40 here... been using it on all my cars for the better part of 10 years now

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  11. #11
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    m1 15w50 for summer

  12. #12
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    If you are running a proper thermostat controlled oil cooler, the ambient temp should not play a significant role in choosing the hot weight. But since I don't have a cooler, I've been running Liquimoly 10W60.


    /.randy

  13. #13
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  14. #14
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    Another Liqui Moly 10w-60 here..

    the lighter weights oil's just don't seem to cut it.

  15. #15
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    Quote Originally Posted by Inicent Child View Post
    Another Liqui Moly 10w-60 here..

    the lighter weights oil's just don't seem to cut it.
    Maybe not in hot Cali, but here in Canada we might want to choose a lighter weight oil like 5-40 or 0-40..
    "There are bold drivers and there are old drivers, but there are no bold, old drivers."

  16. #16
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    Quote Originally Posted by Inicent Child View Post
    Another Liqui Moly 10w-60 here..

    the lighter weights oil's just don't seem to cut it.
    How did you come to that conclusion?

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  17. #17
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    Quote Originally Posted by NOTORIOUS VR View Post
    How did you come to that conclusion?
    Same way he came to the spelling of innocent.


  18. #18
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    I run 5w40 rotella t6

  19. #19
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    Quote Originally Posted by E36 HateR View Post
    I run 5w40 rotella t6
    I run T6 in just about everything.
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  20. #20
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    Quote Originally Posted by Randy Forbes View Post
    Randy: really, no oil cooler? I'll hook you up with an adapter if you want to go with the S-54 filter housing.
    Nope, no cooler as yet. The way my car gets used, the bigger problem is cold oil. By the time it's up to temp, I'm at my destination. And the bit of hooning it does see is short bursts. For *my* usage, I"ve been watching for an OE oil->water cooler I can adapt to my appllcation.


    /.randy

  21. #21
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    Thanks for the advice all. I am going to go with M1 0w-40 euro spec for this oil change and see how it does. Will update if it doesnt work out.
    Current: 2011 X3 35i M-Sport, Deep Sea Blue Metallic, Oyster Napa interior, Afe intake, RaceChip Ultimate.

    Past: 1998 M3 sedan, Cosmos Schwartz Metallic, Black interior, Euro 6-speed, AA Stage II TwinScrew supercharger, and a bunch of other mods.

  22. #22
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    Quote Originally Posted by najnad View Post
    Thanks for the advice all. I am going to go with M1 0w-40 euro spec for this oil change and see how it does. Will update if it doesnt work out.
    You will be fine, M1 0W-40 is good oil with a great additive pack.

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  23. #23
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    10-60 here in UK conditions

  24. #24
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    Quote Originally Posted by E36 HateR View Post
    I run 5w40 rotella t6
    Do you run a cooler too? Do you have an oil temp gauge?

    Thanks!
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  25. #25
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    Quote Originally Posted by B3 DRIFT View Post
    10-60 here in UK conditions
    Isn't that a little thick for cool and rainy? :P

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