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      06-02-2014, 11:52 PM   #331
CSL_E36
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Drives: 96' S54 E36 ///M3 17' M2
Join Date: Oct 2011
Location: Dublin CA

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Quote:
Originally Posted by chris719
Why did S54 ship with 5w-30 then get changed to 10w-60 if this is such a sin to deviate. Why did they continue to blow up after the 10w-60 switch? Why did the Z3M S54 not blow up as much? I'll give you a hint: it's not because BMW was all knowing and perfect in their oil selection for the clearances of the engine.

I don't think you understand much of the physics at play here. If you have high-G cornering problems you need an accusump or dry sump, you don't need thicker oil. That's like putting a band-aid on a bullet hole.

You did not come up with the correct conclusions so I'm not going to continue to argue.
Chris, I'm not going to play 21 questions with you. You keep saying "baind aid". Thats because you agree using thicker oil is effective. Of course, for cars running R compound tires they will pull enough Gs to require some sort of dry sump system.

If BMW thought these motors would live strong during track conditions on 5w-30 then why did they change it?

I can live with fact I made an incorrect conclusion. Can you live with the fact you are arguing for something you cant fully prove or understand? Just answer the question, without "hints". What is the scientific benefit of running a thinner oil in these motors?
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