Cold Start wear studies

[930.engineering]

hmm. oils have less saps, longer oci, than 20-30years ago. (i think less cleaning power)
could it be, all problems are related to dirt accumulation ?

I think that's just not correct.

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[ZeeOSix]

Isn’t that what the filter is for?

He's talking about the oil's ability to clean deposits within the engine. An oil filter cleans what's supspended in the oil, not what's clinging to surfaces.