What is the problem with blue smoke?

[Norman]

When a car emits blue smoke, it is caused by engine oil entering the internal combustion chamber, commonly referred to as "oil burning." This results in reduced engine acceleration, increased noise, and prolonged wear on the cylinder walls. In severe cases, it can damage the entire engine. Here are some additional details: 1. Definition of oil burning: Oil burning occurs when engine oil enters the combustion chamber and mixes with the air-fuel mixture for combustion. This phenomenon can lead to rapid damage to the oxygen sensor, increased carbon deposits in the combustion chamber, unstable idling, poor acceleration, higher fuel consumption, and excessive exhaust emissions. In severe cases, insufficient engine lubrication can cause irreparable damage or even total engine failure, significantly increasing repair costs and posing potential safety hazards. 2. Identification methods: (1) Cold-start oil burning: When starting the car for the first time in the morning, thick blue smoke may be emitted from the exhaust pipe. The smoke usually disappears after a short while and does not recur during the day. (2) Acceleration oil burning: When the driver accelerates sharply while driving or revs the engine while stationary, large amounts of blue smoke may be emitted from the exhaust. In severe cases, the driver may even see blue smoke in the side mirror from the exhaust pipe. (3) To confirm oil burning, fill the engine with oil and drive 1,000 kilometers. Then, take the car to a service station to weigh the oil and filter. Refill the oil and repeat the process two more times to get an average value. Normal oil consumption after the break-in period is typically around 0.3 liters per 1,000 kilometers. If the consumption exceeds this, it indicates an oil-burning issue.