Quote:
Originally Posted by Billfitz
I guess you're unfamiliar with the concept of royalties. Where LL is concerned BMW gets a piece of the action with every container sold that has LL on the label. The same applies to Mercedes getting paid for oil that has MB on the label. Now if you really believe that an oil not LL rated is inadequate for BMW usage, consider the aforementioned Mobil 1. It's recommend by Porsche.
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BMW is not GM (Dexos). They don't collect royalties on oil certs. The approval is good for iirc 3 yrs after which the blender will have to send in a new sample for testing. Yes the oils get run through bench tests.
I never claimed that an oil which lacked an approval is detrimental. The purpose of oil certs is to give the consumer piece-of-mind that an oil WILL NOT cause problems with regards to wear and engine performance over the prescribed drain interval regardless of the blender/cost. It's easier for customers to to shop certs because of the performance differences between oils which have the same weight. For example regular M1 5w30 used to have a HTHS under 3 which was below the min allowed by BMW. M1 has since reformulated this product.