9-3 Sedan, Cabrio '04+, Combi, 9-3X Workshop
I changed my leaking valve cover gasket a few weeks ago. It has probably been close to a thousand miles by now; at first I didn't notice much or any loss of oil but I just took a 270 mile trip and lost between 1/4 and 1/2 a quart. The back left corner area of the valve cover looks dirty, and I...