Cut open PIAA oil filter with a specialised tool for the first time. It was clean inside. What I didnt like was when I removed filter there was almost no oil inside, even though filter is mounted sideways. Its like the ADBV doesnt work. I noticed this with the ENEOS filters too. Maybe thats why after a week of parking, on restart the low oil pressure light stays on for a few seconds. I am now on a WIX filter, will observe if it does a better job keeping oil inside from draining back.
Overall I didn't find metal pieces in the filter.
Overall I didn't find metal pieces in the filter.