Those rubber O rings are completely flat. That is why the oil is coming outIf you'd look closely at the pictures, you'll see that there are couple of o-rings on the shaft body of the valve. Overtime the valve gets clogged up, rubber o-rings harden up and the excessive pressure in the engine is not being ventilated properly through the PCV valve as it is clogged, so the oil particles that's being sloshed around the engine are being pushed through the hardened rubber o-ring seals onto the surface. Replace the valve.
I replaced mine from dealer bought online for roughly about 30 bucks plus shipping.