Do you also want to shove a cork in your tailpipe because the engine smokes? Don't be halfaѕѕed. Find and fix the problem. If your PCV system is actually sucking oil into the intake tract, then it means something's wrong. You're missing baffles or your breather is toast or there's another problem. What exactly leads you to believe your PCV system is sucking oil at high (or any other) RPM?