I opened a Purolator PL14459 oil filter that was on a 2001 Honda CRV running QSUD for about 5000K miles. The anti drain back valve (ADBV) was torn and the piece that came off was in one of the pleats of the filter. The ADBV seemed be very pliable but the piece that was in the filter was harder (somewhat brittle and easy to tear). I have been using the filters for a long time (never opened one up before) but not sure if I want to continue using them after seeing this one.
