The "stealer" told me that number 4 spark plug had oil on it, and said that I need valve cover gasket. I don't believe him because I changed the plugs last month and didn't see any oil in old plugs. Besides the dealer that serviced the car before I owned it told me that valve cover gaskets were replaced 20k ago. I would like to look at this number 4 spark plug myself to see if he is telling the truth. The dealer in question is Life Quality Bmw in Brooklyn New York. I need to know where the number 4 plug is. Thanks Howie