What is the hype with fleece filters made in Germany? I read an article indicating the nano fleece is down to 5 microns. MB go 20 to 30 KM between oil changes. Why doesn't API ILSAC adopt these changes. I understand they regulate oil, but. Maybe I'm looking at in a simplistic form. Granted there are many variables. Could I be mistaken and synthetic filters are better? Just thinking late at night.