[herkyhawki]

You probably have exessive blowby from worn rings or a bad piston. Excessive blowby will carry droplets of oil out of crankase, through PCV and into intake plenum. The breather line that goes from air filter to valve cover is for air flowing INTO the crankcase. If you have oil in it, this means that you have more blowby flow than can escape from crankcase through the PCV valve, so it is also flowing out the inlet port.

Test: Pull the PCV valve out of the valve cover, but leave it connected to the hose. Run the engine and watch how much blowby comes out the PCV hole on the valve cover. Or remove oil fill cap. If you can see/hear/smell exhaust fumes coming out the hole then it is probably time for an engine rebuild. A compression test would help determine if you have one bad cylinder or if all are worn.