My E39 with 220k gets Syntec and a filter every 10k-- at the suggestion of my mechanic. He sees a few more cars than any of us, and when questioned he replied that his observations led to and justified his recommendation. And in a way, he sells oil- at retail. Lost profit!
2000 528it (5-sp manual, M52TU engine, 220k miles and going strong) Bimmer #13!