I have took apart more than a handful of such, I showed them to a very good machine shop.

This failure is the oil pump going a bit nuts, the oil pump in these newer NG8 engines is not a regular pump but a variable geometry pump which is ECU controlled, For this reason the engine needs to be primed when a job involving the oil main oil gallery is done.

Also heavy fuel dilution causes rapid oil breakdown in these engines - and the cherry on the cake is the crazy oil change interval.

btw - the picture you posted looks like an engine with valvetronic and you also mention X5, - that would make it an N55 which is a single turbo DI engine

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)