I have a Mercedes E 320 wagon which is using oil and my mechanic say the first piston is shot, due the nickel wearing insided the piston.
He suggest buying a used engine, however, before this began happening he changed the valve cover gasket to the engine. I have own the car the entire time and I have used synthetic oil for at least 10 to 12 years,
Should I buy a remanufacture engine or a used, are have the cylinder fixed if possible?