ok i think i found the source of the problem ..this morning i removed the TOYOTA YARIS oil filter ..yes it had a purolator oil filter ..it had aprox. 4000 kilometers [2400 miles] and to my surprize it was in MINT condition ..no unglued media separation ...WHY ???? because it had a METALcrimp to hold the media together ...the oil filter for my jeep liberty did not ,on mass production did they forget to install the metal crimp ???????