OP, dont take this personally, but you are over thinking it. If all it requires is a 5w30 SM GF4, then its safe to say synthetic isn't even necessary. I can understand wanting a quality synthetic in a turbo application though. M1 5w30 or whatever you can get your hands on for cheaper will work just fine for you.
Follow the owners manual at either the normal or severe oil change interval recommendation depending on how you drive and enjoy your new toy.
Follow the owners manual at either the normal or severe oil change interval recommendation depending on how you drive and enjoy your new toy.