What Causes Oil Leakage in the Exhaust Pipe of a BMW 525?

[Vincent]

BMW 525 exhaust pipe oil leakage reasons are as follows: Condensation in the exhaust steam pipe: Oil leakage at the engine exhaust pipe is generally caused by the condensation of exhaust steam inside the pipe. Additionally, if the exhaust valve is poorly designed or the engine oil is overfilled, it can also lead to this phenomenon. Wear of the floating bearing seal ring: If the vehicle has just been serviced, residual oil in the cylinders may cause temporary oil discharge. However, if oil leakage persists after prolonged operation post-service, it is likely due to wear of the turbocharger's floating bearing seal ring, which significantly increases the possibility of oil leakage.