Furthermore, with the N62 and newer engine variants with the aluminum piston sleeves, they expand at a rate faster than they should be due to higher temp thermostats and the engineer's (more like accountants who only want engines to last within the warranty period and then start encountering failures) opted for a lower weight oil again to save in fuel economy at the expense of drastically reducing engine life.
Running a low temp thermostat and some heavier oil like 10W40 is a very common sense solution to a more reliable, dependable BMW engine.

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2003 4.6, esotril blue, over 215,000KM. Every previous owner failed to keep up the vehicle maintenance. Restoration project.