That's a bad sign and suggests that you may be getting a lot of blow-by past your piston rings.
Before I dug in very far, though, I would pull off the PVC and clean it. It is that object about the size and shape of a human heart below the intake manifold. Pretty easy to get to. Make sure that the drain from the PVC down to the oil pan is not plugged, and that the hose is not collapsing when the car is running. That drain hose gets old and mushy. A good parts house will have a piece of standard hydraulic hose of the proper inside diameter to replace it.