Originally Posted By: Kira
I'm in the don't fret corner too. Seeing what the next filter (the WIX) will yield on the stick is what you need.
HOW MUCH longer does the oil pressure take to come up? This is where I might just jump ahead and change the filter prematurely.
Just between you and me, The effectiveness with which drain back valves work has always been questionable in my mind. It seems they came up with an idea for a shape and went with it. IF it works, OK. If not, they don't care.
Oil filters on the family's Saabs (there were 6 of them so I have some "hands on data") performed differently regarding how much oil had been held back by the ADBV. Unscrew some and there'd be nothing. Unscrew others and I'd get a quart of oil from the engine's upper reaches.
I also think the ADBV isn't alone. The configuration of the oil galleys and their size plays into an ADBV's performance, I believe.
Kira's right. Some engines are notorious for cold start clatter and Saab is one. I have always thought it might be the pressure relief valve in the filter base that has just a tiny flaw in the seat. Nothing to do with the actual filter. Over night it'll let fluid out/down, even if it means nothing to a running engine ...