I have a Napa Gold (WIX) filter that I just purchased a few months ago. I always look at the threads to see if there are any metal shavings hanging loose. I spotted one on the inside of the filter and bent it outwards with my finger. I couldn't get it to break loose, so I went to get small needle nose pliers and tweezers. The filter was laying on its side. When I got back the metal shaving/chip was gone. I don't know where it went. There was nobody else around. I looked on the table and inside the can. I banged the filter on the table to see if the piece would fall out. The chip/shaving was about 3/16" long and looked thicker than a human hair. I really don't want a piece of metal between my crankshaft and bearings. The filter was under $4, so I am not out that much. I might just cut it open to see what it looks like.