First UOA here https://www.bobistheoilguy.com/foru...
The engine is original, no repairs, well maintained from new, driven by me only from day one, does not consume oil, performs flawlessly. Long journeys is the 95% of the engine total distance. First time ever that I tried 20.000kms oil change interval (which is what the user manual calls for with the 913B approved oil which is now obsolete,913D is the latest and improved one).
Would you worry about it?
The oil interval was 18 months.