As I understand it, the 420a pcv system works like this. Fresh air comes in from the air intake, after the air filter through the "breather tube". The blow-by air, with goes down the piston through the crankcase and thus has some oil in it, goes through the PCV tube (one on the pass. side of the VC) to the inlet manifold.

Now I have searched for this, and found various references on oil in the breather line, and recommendations for catch-can there. My problem is that I have oil in the PCV line, but the breather tube is clean as can be. I am burning (it is is not on the floor or in the coolant) about a quart of oil every 3-4 weeks, which is about 200 miles of driving for me. I sometimes see smoke from the exhaust, usu. at stop lights.

Now to my question (finally Can this all be from oil through the PCV line into the combustion chamber. BANME!, the engine runs fine otherwise, though I have not done compression tests yet.

Appreciate your response.
-BANME!i