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My theory (and supported by Blackstone results) is: the wear happens right at the beginning.
I am the one and only owner of my car. 2008 E90M3. BMW/Castrol 10W60 every 5000 miles, DIY by me every time. When I bought the car I was already tuned up to oil analysis and bearing failures, as I had S54s in my fleet at the time. I think I was one of the first to Blackstone-test an S65. See attached. The first Blackstone report on the car was bad. The second was not good.
Now, when I test it at 60,000 miles, it looks OK.
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