My buddy just changed his oil in his 04 and now every once in a while he will get an oil smell out of the vents. He also used 6 qts of Amsoil 5w-20 with a K/N filter. He doesn't have any visible leaks and I would assume that if there are any over night they would eventually make their way to the ground. He says he did spill some but I would think that after a couple of weeks it would have all burned off. I cannot figure it out. Any ideas?
