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  1. #1
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    BMW adds 5w30 to M engines oil list

    Saw this on M5board from member b767capt,

    http://www.bmwusa.com/Standard/Conte...ngineOils.aspx

    BMW added 5w30 to there M approved oil list it seems.

    Not sure if its better then the 10w60, as ive been always running this weight.

    Any oil gurus to tell the difference?
    ///M5 LCI
    "It's like the F10 is the 911 Turbo to the E60's GT3" -Pistonheads (M5 feature)

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    interesting

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    always running 5w30

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    M cars.

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    Click here to enlarge Originally Posted by LostMarine Click here to enlarge
    interesting
    Might be a mistake to mean newer turbo M engines, not sure how BMW goes from a 10w60 to a 5w30...
    ///M5 LCI
    "It's like the F10 is the 911 Turbo to the E60's GT3" -Pistonheads (M5 feature)

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    there has been a lot of discussion about it since so many bearing failures and threads. Personally i have not switched, but i probably will

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    Click here to enlarge Originally Posted by LostMarine Click here to enlarge
    there has been a lot of discussion about it since so many bearing failures and threads. Personally i have not switched, but i probably will
    Yea I haven't either. Ill wait until I see more data and views on this thinner oil, until then, 10w60 and always make sure car is warm before getting on her.
    ///M5 LCI
    "It's like the F10 is the 911 Turbo to the E60's GT3" -Pistonheads (M5 feature)

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    Does this include the e46 m3?
    E46 323i-rip
    e46325ci- sold
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    e46-m3-ripClick here to enlarge
    fj cruiser- sold
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    http://theworstdrug.com/25

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    I don't think that means you can dump 5w-30 in an S65 or S85 - that is an OR not an AND.

    *The following is the only recommended and approved synthetic oil for BMW M (Motorsport)
    vehicles in the US market with gasoline engines, at the present time.

    And then it lists all the oils - note, this includes present S engines

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    The more times I re-read that, the more confusing it is. I honestly think that's incorrect wording, but idk. I don't see how they can go from saying use something as thick as honey to go ahead and use pretty much a standard oil. If I were going to change, I would first write BMW - I wouldn't trust that list, it makes no sense. I think they are referring to the new group of M motors - that do not require 10w-60, and have been calling for 5w30 since they have been released (latest m5/m6/x5m/etc.)

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    Click here to enlarge Originally Posted by LostMarine Click here to enlarge
    Personally i have not switched, but i probably will

    Better do it,those bearing clearances and axial play and a heavy weight oil like TWfeckingS do not go well together...

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    Don't switch till you get it clarified ..... I found this change ..... Odd.

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    ive been reading lots of things on BTOG, seems they recommend it as well

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    Click here to enlarge Originally Posted by 5soko Click here to enlarge
    Yea I haven't either. Ill wait until I see more data and views on this thinner oil, until then, 10w60 and always make sure car is warm before getting on her.
    They went thinner for a reason.

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    Interestingly enough the 5w-30 was the recomended weight for the S50B3x Euro M3's and also the S38B3x M5's, but when the E46 M3 was introduced (and the E39M5) they suddenly went with the 10W60. Makes you wonder if it was a part of a deal with Castrol, rather than having people buy Mobile1 5w30 which was the prefered choice for ///M drivers.
    1995 BMW M3GT nr:111/350 TwinTurbo and some other mods.

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    Click here to enlarge Originally Posted by M3GTtt Click here to enlarge
    Interestingly enough the 5w-30 was the recomended weight for the S50B3x Euro M3's and also the S38B3x M5's, but when the E46 M3 was introduced (and the E39M5) they suddenly went with the 10W60. Makes you wonder if it was a part of a deal with Castrol, rather than having people buy Mobile1 5w30 which was the prefered choice for ///M drivers.
    This is a great point. Sometimes manf. Switch like this due to bulk deals they make with oil companies. I have a feeling this has to do with the bearing issues though. Anyone have any updates on why they switched?
    Click here to enlarge
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