Filter draining back = low pressure on startup?

[Reloader59]

Purolator Boss filters that I have opened, hold a large amount of oil even after sitting on the face plate for a while.

 

[TC]

Thanks for the thanks! As you can tell, I was quite BORED today.

 

[Lawnman23]

If the consensus is that the SuperTech's ADBV setup is lacking, any suggestions on what to filter to try next? I'm mostly using Fram Ultra Synthetics on my other applications.

Carquest Premium 85394 from Advance Auto.

 

[HawkeyeScott]

Update: Installed a Denso filter last week. Oil light duration has shortened some, but still lasts about 2-3 seconds. Also bought a Hengst filter to try next.

 

[Hohn]

A silicone ADBV could certainly be superior, but more importantly, I'd try a filter with a completely different design, especially the ADBV. Others on this board who are familiar with Toyota filters can help with that.

FUN QUIZ!
A car engine is exclusively lubricated by motor oil, correct? (Think it through before reading further.)

_________________________________________

Turns out no. The first couple seconds it's a zinc lubricated engine, with surfaces coated with sacrificial zinc rubbing against each other, then quickly becoming oil-lubed thereafter. Motor oils typically contain about 1,000 parts per million zinc dialkyldithiophosphate or "ZDDP."

Nope. It’s still oil-lubed. And the ZDDP is less than 1000 because API SP caps phosphorus at 800ppm. Unless you go up to 40 grade, in which case you can get a higher additive level because that’s not ILSAC.

All the more reason to run a 40 grade— better additive packages.

 

[TC]

Update: Installed a Denso filter last week. Oil light duration has shortened some, but still lasts about 2-3 seconds. Also bought a Hengst filter to try next.

Cool. Glad the Denso filter I suggested cut the oil light duration from 4 seconds to as little as 2 sec. I'm curious what the Hengst might accomplish should you try that, although the Denso could prove as good as it gets for you.

 

[TC]

Nope. It’s still oil-lubed. And the ZDDP is less than 1000 because API SP caps phosphorus at 800ppm. Unless you go up to 40 grade, in which case you can get a higher additive level because that’s not ILSAC.

All the more reason to run a 40 grade— better additive packages.

Rislone website: "ZDDP is a combination of zinc and phosphorus. When put under pressure, like between a flat tappet camshaft and a lifter, ZDDP attaches to a metal surface and becomes a sacrificial wear material. Older engines need this protection, especially at start-up. (That’s why the old saying, “The worst thing you can do is start your car” has a great deal of truth to it.)"

Some engines, especially worn engines, may require several seconds at start-up until oil pressure is achieved. If the engine is truly "dry" before then, there's only limited oil lubrication in those first seconds, but certainly zinc lubrication.

I used 1,000 ppm as a round number. The Rotella I use is around 1,100 ppm zinc per VOAs.