The used filter came off of the Frontier on a run with ST 5W30 with approx. 4800 miles on it. The virgin filter was the last one in my stash. It cost me less than two dollars at a KMart going out of business sale so there wasn't much tied up in it. There wasn't much to show. The used one had no tears. I had to drill a hole in the bottom to get the remaining oil (quite a lot actually) to drain so the anti-drainback appeared to be working. It appeared to do an adequate job for this OCI. No issues on the unused one either. Had I known its condition beforehand, I would have happily used it for my next 5K OCI.