9-3 Sedan, Cabrio '04+, Combi, 9-3X Workshop
I swapped the spark plugs on my 2.0T to try and fix a misfire problem when accelerating from cruise condition, and I noticed that number 2 and 3 has engine oil on the threads. The plug holes are clean and I already changed the valve cover gasket 2 years ago, so I'm wondering what it might be...