First thing to do is replace the PVC valve. You bought this car used, do have any documentation on how many times the car had and oil change and if it was conventional or synthetic?
How many Qts was it low?
Was this car originally a leased car?
You were in contact with the original owner, but you can not necessarily believe what he tells you. What was his story on the car? Did he take it to the dealer for oil changes?
Next question, Do you or can you, change your own oil and filter with full confidence on what you are doing,? Or have you always let other people do this for you?
What I am getting at is if this car was run with conventional oil and the owner was a penny pincher and said screw the guy who owns the car after me and never changed the oil and did short trips, he could of sludged up the rings. Then you "can" have an oil burner. Take your cell phone light and flash it inside the valve cover, look all around from different angles, do you see clean aluminum, do you see a light ting of brown, or dark brown?
See the linked picture, notice the cylinder head in the back ground. Does yours have the light ting of brown like this ones on the cap that hold the cams in or is the color darker like the foreground valve cover and dark like the majority of the underside of valve cover? Better yet, see the top of the valve cover, were the half moon radius cut is, that is the start of sludge, it is a hair darker then the center valve cover. Then the light varnish is at the lower part of the valve cover. Does most of what you see while looking inside your valve cover oil fill hole look like the lighter color though out?
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