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      07-27-2020, 01:51 PM   #1
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patchesj's Avatar

Drives: BMW M6
Join Date: Jul 2020
Location: KY

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Oil analysis/choice discussion

After hijacking another thread (sorry...) figured the discussion was better started anew. I have attached my recent Blackstone report from 2700 mi old Castrol 5w-30 done at BMW dealership. I have since moved to 5w-40 Molygen in hopes of improving high temp viscosity (My sample came back just barely in the 30w range) and lowering Ca (Theory is that high Ca can lead to pre-ignition under boost in engines that burn more oil... Read=not good for S63's).

I believe the slightly elevated Ti and Ca might indicate the dealer did NOT use the "EU" version of Castrol, but this is totally theoretical on my part.

Also, super handy oil viscosity conversion chart from:
Attached Images