Quote:
It's interesting about how the orange anti drainback valves come apart like that....
I'm not willing to concede based on an anecdote, that silicone adbv's as a rule or even in general come apart more than nitrile adbv's. In fact, extended oci filters most often use silicone adbv's. And, it still doesn't correspond to the dealer's explanation of the Ultra not having an adbv. I'll still opine that if said Ultra could be examined (unless tampered with), it's adbv is intact.
Quote:
I used a Wix (IIRC) with an orange gasket (the one that seals the filter to the engine) and it loosened up, allowing the filter to seep a little oil. When I put my filter wrench on the filter, I discovered it was only finger tight....
I believe you are confusing a filter sealing gasket with an adbv here. Afaik, Wix/Napa Gold has never used a silicone sealing gasket, only nitrile. They do however use a silicone adbv, but that would have nothing to do with how tight the filter was at any point in the oci. Now sometimes in winter and cold temps a filter installed hand tight in the heat of summer could show some leakage later from the between the engine and gasket in very cold temps in the winter.
Quote:
I never had this problem with ACDelco or any filter with the black gasket, and yes I tighten them correctly, ....
Again, sealing gaskets have no relation to the adbv's being referenced here, so filter tightening would make no difference to adbv function. And if I once see a silicone sealing gasket, it will be the first. Fram, Purolator, Wix, Champ, Donaldson, Amsoil etc. all use nitrile sealing gaskets.
