I have a 2001 A6 2.7T. It is smoking and oil is leaking from the tail pipes. It doesn't start smoking until after the engine is completely heated up though. It's losing oil pretty quickly and I am also getting oil on my spark plugs. I'm not losing any coolant, getting coolant in my oil or oil in my coolant. I originally thought it could be the pcv breather hose assembly because it was really clogged when I took it off. I bought a new one and still have the same problem. Some people have told me it is a bad turbo seal. Valve gaskets or piston rings maybe? Anyone have any input?