I have a 2001 S60 and a couple of months ago it started leaking oil on me. The leak is coming from somewhere from behind the engine, by exhaust manifold. I thought is was oil pan, but its not. Seems as if the whole rear side of the engine is covered in oil. Its not a big leak, as the level of oil hasn't been noticeably falling. It seems as if oil gets onto drive axle, which throws oil around. I don't know if there is some gasket or seal on the back side that needs to be replaced or what. Maybe oil cooler seals? If someone had/has a similar problem and has any suggestions, I'm open to everything. Thanks guys.