Old Oil - really, really old oil...

[patrickt]

Originally Posted by hauss

you did not mention detergents or anti foam all important additives that get consumed .

That's the TBN (total base number). Easy to compare and see how the detergents are being consumed. But that brings up another topic. Did you know that changing your oil too often will actually increase the wear on your engine? Tribochemistry. The interaction between the anti-wear additives and detergents creates an upswing in initial wear. You'll win a few barroom bets on that one.

[NROTOXIN]

Originally Posted by patrickt

That's the TBN (total base number). Easy to compare and see how the detergents are being consumed. But that brings up another topic. Did you know that changing your oil too often will actually increase the wear on your engine? Tribochemistry. The interaction between the anti-wear additives and detergents creates an upswing in initial wear. You'll win a few barroom bets on that one.

Is that engine oil's equivalent of GOOD FLORA vs.BAD FLORA?

[patrickt]

Originally Posted by NROTOXIN

Is that engine oil's equivalent of GOOD FLORA vs.BAD FLORA?

Kinda. More like all things in moderation. Including oil changes, detergent additives, and anti-wear agents.