I use Mobile One 0w40 in all my engines as well as all customers machines. It is a fantastic oil that meets some very stringent certs, VW 502/504.1 (diesel)/505, BMW LL, ACEA A3/B4, ISAC GL-5, MB 229 among others. It is their best oil save ESP formula 5w30 which achieves the VW 507 cert.
I use...