| It might just be the valve covering gasket. I just know that switching from regular to synthetic when the car is used to regular is risky. Synthetic only works when the car or engine is new. The thicker regular oil is fine (20W-50). There is know point in my opinion to spend triple the price of regular oil on a car that is most likely used to regular oil. Synthetic oils don't really show any benefits on high mileage engines. If you have been using synthetic from the beginning, then keep using it. I would change the valve covering gasket and drive it for a week and then take the valve cover off and check it out. If there is still oil in the plugs, switch to regular 20W-50 and I am 95% sure the problem will go away. You want to fix this problem rather quickly because if that oil stays down in there and heats up, you could be replacing your wiring harness soon ($1000). Good luck. |