First the Porsche. I have a 2000 Boxster with a 2.7L I6. I run either PP 5-40 or M1 0-40 and hang around 10,000 mile OCI (I am not brave enough to follow the Porsche 15,000-20,000 OCI). Right now I am running the Mahle branded factory filter, no idea who actually makes it. It has a large sump...