Doug Miller wrote:
....
Then I'm at a total loss to understand where you thought you read that the sky
is falling.

It's the logical characterization by extension of your absolute position
which is repeated on a myriad of subjects...

It's not that the statements themselves are strictly incorrect (yes, new
oil is more lubricating than old, and yes, what is entrained in used
oil isn't a lubricant), it's that you tend to apply the principle to the
extreme where, in this case, the lubrication reqm'ts are so minimal and
the inevitable introduction of extraneous dirt and grime makes carrying
on over using virgin lubricant specifically tailored to the purpose such
overkill as to invite parody...

That help?

And, btw, most of the loss of function in motor oil isn't the oil, per
se, it's the breakdown of the additives that are there specifically for
the high-temperature/high-pressure conditions of an engine--conditions
not at all prevalent in the application here.