So, this filter has a story behind it. Long while ago; my friend brought this filter from his rental place where he works and a jug of PP 5w30 oil. He ran the oil for 9,xxx then used some of the newer PP "pure plus". Don't know why he didn't change filter also. For a E Core filter I am impressed. Car has 39,557 on it currently also and it runs good. He does a 50/50% mix of highway to city. I put more PP 5w30 and a FRAM ultra in and on.