Originally Posted By: Shannow
I'm not sure what "inherent oil system capacity" is meant to define other than sound wordy
Oh, I hate being wordy. Also hate being vague and leaving statements open to alternative interpretations, even more. No matter how explicit one tries to make their posts, there's still an exploit or two for semantics to rear it's ugly head. Would have just loved to say "sump capacity" in that context as it's functionally the same but technically incorrect. [censored] if you do, [censored] if you don't.
-How does ANY additional volume between the oil pump and the oil galleries help in any way ?
A larger filter canister increases the total system volume of oil. I said 'inherent' because the system inherits the additional capacity with the dipstick remaining at the normal FULL mark. So we're not overfilling the sump, but rather increasing the oiling system's capacity by leaving the sump alone and adding more circulating capacity elsewhere. More oil in circulation is 'better' but certainly not as good as a full on bypass system.
-If it was in the sump, then there's grater margin before running dry/sucking air...yes better, but not usually necessary.
Being after the sump, should a pickup tube start grabbing air, the extra volume downstream of the pump may provide a longer 'oil froth/foam' delivery through the increased filter capacity. Foam/frothy oil is better than nothing, right?*
*inconsequential speculation included for discussion alone
The tribofilm and resiudual oil are still there from last time you ran the engine.
By "dry" I'm referring to the oiling system. A main oil gallery full of air would be what I mean by dry, not the absence of tribofilms.
Why does one have to prove that ?
No one gets to make a claim of futility (or even detriment) and then not prove that oil where it should be is a worse thing than when it is not where it should be. To even attempt to make such a argument is truly nonsense by definition.
-As to your "clean" bottle of oil...
At face value, that analysis is compelling. What brings me back down to earth on that one is the fact that we don't know what kind of particles those are. I'm apt to believe they're nothing more than agglomerated additives rather than entirely foreign abrasive contaminants. Who's ever looked at the remains of a brand new bottle of Pennzoil for instance, lots of clearly visible particulate at the bottom of the empty jug. Harmful? I have serious doubts about XOM or Shell being that negligent to allow large abrasives in their oils and relying on the service oil filter to clean it up. Seriously, think about that.
Originally Posted By: goodtimes
The new filter itself has dirt in it,
This. I've been known to run a vacuum over the threaded hole of unsealed filters prior to installation, just because you never know with those freshly-machined works of art.
