[mechanickeith]

Any car with a road draft tube will drip oil onto the valve cover. Thats a given. If you have the stock breather cap, it will be minimal. If you have a PCV valve system on your motor, you should have no oil leakage. This is assuming your motor is in decent shape & does not have excessive blow by. Every time I am under the hood checking the oil, water,etc. I allways wipe the area around the breather cap. Just a habit I guess. The current build has about 200K on it. Several oil leaks but the plugs come out perfectly clean, so it will run some more.