What causes blue smoke from a car's exhaust pipe?

[StKeira]

The reasons for blue smoke from a car's exhaust pipe are: oil leakage into the exhaust pipe, excessive clearance between the piston and cylinder, and piston ring seizure. Here are the relevant explanations: 1. Oil leakage can cause blue smoke: When blue smoke appears from the exhaust pipe, the first step is to check if there is oil in the exhaust pipe. If the valve stem seal is leaking oil, it will allow oil to leak into the exhaust manifold, and the high temperature will produce blue smoke. 2. Possible consequences of blue smoke from the exhaust pipe: Blue smoke from the exhaust pipe indicates the car is "burning oil," which refers to excessive oil in the combustion chamber participating in the combustion process. The consequences of burning oil include increased carbon deposits in the cylinder, leading to incomplete combustion and reduced power.