"Very little moisture is moving out of the oil when the oil temp is 160*."

I am not trying to "boil off water".
That would be a silly undertaking.
My engines are in good condition.

If I had a PCV system, I would be trying to draft-out any vapors that get into engine from wherever.
Where/when/how do you suppose that water gets into the engine (I know a few ways, but not after 1955st; and, not in my 1954 engines)?

What does a PCV system do?