This points out how little we actually know about what goes on inside filters in real world use. Why did that particular portion blow out? How durable is flattened media after prolonged use? Is media more important than design and construction? Of course the big question is really what, if any, good does an oil filter do? Bob, the original oil guy, did some pretty convincing tests that showed oil filters aren't really necessary. Lot's of older vehicles went long distances and long intervals with no oil filters, and even some current machines don't have much in the way of filtration (Honda Rebel motorcycles come to mind, along with many outboards). I ran a 9.9 HP Yamaha outboard for many thousands of hours and it only had a very crude oil screen and no air filter whatsoever. Changed engine oil every 100 hours or so (equivalent to 5-7500 mile OCIs), with the engine routinely run at WOT for hours at a time. Even after several thousand hours of use, the engine did not burn any significant amounts of oil and it only held one quart so I would have noticed. Maybe those stainless steel screen filters with something like 20-40 micron holes are really better as the only necessary function is to catch gross pieces of junk floating around, and flow is really more important than filtering.