I was wondering about the amount and size of the inlet holes of the many different oil filter brands.
I can understand that more and larger would be a good thing for HEMI engines that have the cam and lifter tick and more oil flow would benefit for better lubing the internals using a good quality synthetic oil, but what about that silicone anti-drain back valve?
Is that drain back valve doing what it's supposed to do when the engine is shut down?
Is it actually sealing off preventing oil from draining back down into the bottom of the engine because of the possibility of the larger/more inlet holes or is there still enough oil psi built up in the engine when it's shut down that there is a lot of oil bleed down?
I don't have the the famous HEMI tick but just the occasional dry start up clatter even when using the Royal Purple 20-820 and the Purolator BOSS PBL 24651.
However, when I was using the MOPAR MO339 and MO899 with Pennzoil Platinum 5w/20 and 30 my HEMI has the dry start up clatter a lot. Best thing I did was get away from that oil/filter combo and made the move to Red Line 5w/30 and the Royal Purple 20-820.
I've cut open a few of the high end oil filters and viewed for myself what the internals looked and felt like and the anti drain back valves look to be the same in comparison ... so, idk ... just wondering.