What Causes Blue Smoke from the Engine Exhaust Pipe?

[DelJameson]

Engine exhaust pipe emitting blue smoke is caused by burning engine oil, indicating that the oil enters the combustion chamber but cannot be fully burned, resulting in blue smoke being expelled from the exhaust pipe. Blue smoke is a severe symptom of oil burning. When this occurs, it is essential to immediately inspect the cause of the oil burning and carry out repairs. Engine oil is often referred to as the lifeblood of the engine, serving not only as a lubricant but also providing cleaning, sealing, buffering, rust prevention, and heat dissipation functions. Without engine oil, the engine cannot operate normally. During engine operation, the oil forms a protective film on the surfaces of various components, preventing direct contact and friction between them.