I had a couple of Purolator PL24651 filters in my stash and thought I would run at least one of them for 3000 miles to see how these were doing rather than use them for target practice. I figured the filter should go 3000 miles in 2 months using Maxlife 5W30. Purolator PL24651 Date code: F07F30G1 After 3000 miles, I did notice a little startup rattle so I arranged to see if the ADBV held or not. I came in from a long run, parked the truck and after a couple hours spun the filter off expecting to see a flood of oil which would be normal for this engine. About a tablespoon of oil fell into the drain pan from removing the filter. This means the filter did not have ADBV function. The photos will show the ADBV is in pristine condition so the source of the leak down is not likely the ADBV itself. The ADBV had no tears or cuts and was one of the best ADBVs I have touched. I suspect the sealant they use between the base plate and the external can which holds the gasket is not complete or failing. I had to use a cap wrench to remove the filter as it would not budge. The gasket stuck to the filter mount. I like the gasket, but that is not why I would buy the filter. If you look closely at photo #5 at about 9 O'clock on the base plate, you will see some black residue. I believe that to be the sealant. I do not know if this is the leakage path or not. It would need closer examination and dissection. IMG_0567-Purolator PL24651-F07F30G1 Filter label IMG_0569-Purolator PL24651-F07F30G1 Date Code IMG_0566-Purolator PL24651-F07F30G1 Inside of can with leaf spring IMG_0570-Purolator PL24651-F07F30G1 Inside surface of the base plate with silicone ADBV in place IMG_0571-Purolator PL24651-F07F30G1 Inside surface of the base plate with silicone ADBV showing inlet side of the ADBV IMG_0580-Purolator PL24651-F07F30G1 Base plate exterior view IMG_0573-Purolator PL24651-F07F30G1 Filter media showing wide pleat spaces either side of the splice IMG_0574-Purolator PL24651-F07F30G1 Filter media rotated 90 degrees IMG_0575-Purolator PL24651-F07F30G1 Filter media rotated 180 degrees IMG_0576-Purolator PL24651-F07F30G1 Filter media rotated 300 degrees IMG_0577-Purolator PL24651-F07F30G1 Bypass valve IMG_0578-Purolator PL24651-F07F30G1 Inlet/Outlet end of the filter IMG_0579-Purolator PL24651-F07F30G1 Inlet/Outlet end of the filter on axis view Since the filter did not tear on the short run, I will use the second one on another short run. I think the Valvoline Maxlife 5W30 shears down a bit after 2000 miles or so and this may contribute to how quickly the oil drains back. Since the wide pleat spaces are still there, I do not want to take a risk running the filter type for a longer OCI / FCI. Enjoy and let the discussions begin. Welloiled.