Quote Originally Posted by YellowYata View Post
That's really a good question for an oil catch-can thread but the quick answer is you should never pack steel wool inside the baffles. Not only does it impede what little airflow there is (too little IMO) but there's moisture in that system that turns the steel wool into rust which then travels back through the intake tube on one side and through the PCV valve and intake manifold on the other side. The remaining material just becomes an oily blob that impedes crankcase ventilation. In short, it's a bad idea.
I mentioned "stainless steel" wool. I assumed regular stuff would rust. My thought is, that the really course stuff (for scrubbing pans) would be there to condense the oil vapor, so it's less likely to get sucked back into the air intake.

-Jim