Leading synthetic oil makers (SOPUS , Mobil / Exxon) claim 10K OCI's - but are the oil filters in jeopardy with a 10K mile change interval ? The opinion of my mechanic on the topic is that he : "Believes even in a well maintained engine using synthetic oil - 6,000 - 7500 miles is about all he would want to see using a top tier oil filter (M1 , Pureone , Bosch D+ , etc.) due to potential flow restriction , clogged filters , etc. What are your thoughts on the subject ?