Originally Posted By: glennc
I hate to sound like a broken record but I know that oil will clean ordinary sludge-type deposits if given a chance, based entirely on my experience with sludged-up motorcycle crankcases. Change the oil, sludge goes away.
Harder deposits I will make no claim about.
However it seems to me that one of the oil's primary jobs is to encapsulate and suspend contaminants and that it will do so whether the contaminants are formed while the oil is in the engine or were already there when it was put in.
I know in some car engines sludge will remain, but to me that is more an argument that those engines are particularly prone to keep forming new sludge than that the oil is incapable of dealing with some amount of sludge in the first place.
My humble opinion, anyway.
I have had similar experiences with Motorcycles, I gave credit to the HDEO, but you have observed it with PCMO. PP is now claiming in an add, that it will remove existing deposits. I wonder how true, and what is the basis for their claim.
What about ARX, if not a solvent or a detergent, makes it clean?
Esters?....could you not just run a Group V oil then? And what about all the problems with PAO's cleaning the crud of seals and
the resulting weep, wasn't that "cleaning".......I know, sooo many questions