I cut open the last oil filter I used (first filter I ever cut open). Purolator PureONE PL14610, in use for 2745 miles with PYB 10W-40 SN after an Auto-RX run (this was the "rinse" phase):
Filter was cut open using a Dremel. Anti-drainback valve was still soft and pliable; after puncturing the can, oil leaked out. Not that it matters much since the filter isn't at an angle where oil can drain back into the sump. I still have this filter, if someone wants pictures of something else about this filter let me know.
Filter was cut open using a Dremel. Anti-drainback valve was still soft and pliable; after puncturing the can, oil leaked out. Not that it matters much since the filter isn't at an angle where oil can drain back into the sump. I still have this filter, if someone wants pictures of something else about this filter let me know.