While at WM yesterday I spot checked different size M1 20,000 mile oil filters and left impressed (visually) at the consistency of the build quality , uniformity , cleanliness and each filter had a plastic seal on the open side.
The area where you screw in the oil filter to your engine was extremely clean , shiny and had zero burrs . The inside leauvers were perfect round openings while the gasket and exterior black cases were perfect (looked like Mobil had each exterior cannister oil filter waxed before leaving the factory). Build wise, this M1 oil filter was as nice or nicer than my recently bought CarQuest Premium oil filters . I definately would consider using M1 oil filters in the future once my CarQuest Premium and Fram Endurance oil filter stash is used up .
The area where you screw in the oil filter to your engine was extremely clean , shiny and had zero burrs . The inside leauvers were perfect round openings while the gasket and exterior black cases were perfect (looked like Mobil had each exterior cannister oil filter waxed before leaving the factory). Build wise, this M1 oil filter was as nice or nicer than my recently bought CarQuest Premium oil filters . I definately would consider using M1 oil filters in the future once my CarQuest Premium and Fram Endurance oil filter stash is used up .