If the PCV hose is dry the problem is not the PCV valve. I had the same problem, turned out to be the intake gaskets...bottom side wasn't sealing, causing
oil to get sucked out of the lifter valley into the intake ports. If this is the problem, when you pull the intake you'll see dry intake runners in the manifold but oily intake ports in the heads (exhaust ports dry, or at least not oily), indicating the point of entry into the intake system.