So let me try a theory here.

The lack of positive crankcase ventilation for these
engines is really a bad feature.

A friend measured the PH of the condensate water on the oil dipstick
of an IO-520. PH was 2: Like nitric acid. Having that in
your crankcase is bad.

So why shouldn't we provide PCV by dumping the output of
the wet vacuum pump directly into the crankcase? On the
IO engines, I'd run it into the timing plug in the front.

Then I'd have the air-oil separator on the crankcase breather.

That would give several CFM of air douching the crankcase.

Now the problem is: How much moisture would be condensed out
of the breather air? A gallon/hour? An ounce/hour?

I've wondered if the Airwolf/Walker separator could be modified
so that the oil drain had about a 3/4" standpipe in it with a second
drain added for water that was flush with the bottom of the device.
Then the water could be drained during preflight. The oil would
decant back into the crankcase.

I know there are EPA considerations on this.

Just a thought. I think less corrosion would lengthen the
cylinder life. Bill Hale