Can someone tell me what it's like to burn engine oil?

First, the main reason for burning engine oil

1. Use inferior or unqualified engine oil. Low quality engine oil will lead to increased wear. In addition, too low or too high viscosity of engine oil will lead to poor lubrication of engine, aggravate the wear of piston ring and cylinder wall, reduce sealing performance and lead to engine oil combustion.

2. The clearance between the piston ring and the cylinder wall is too large, the piston ring is improperly installed or the sealing performance is poor, and the engine oil on the cylinder wall enters the combustion chamber, causing the engine oil to burn; In addition, the sealing performance of the valve sealing ring is poor, and the crankcase forced ventilation valve (PCV) is damaged or the crankcase vent is blocked, so that the pressure in the crankcase is too high, and the engine oil will enter the cylinder with crankcase gas to participate in combustion.

3. Oil burning caused by excessive oil filling. When the oil filling exceeds the center line, because the oil pressure is too high, the part that is splashed and lubricated during engine lubrication will run into the combustion chamber for combustion.

4. The turbocharger leaks oil. The turbocharger is installed at the front end of the exhaust pipe, and its working temperature is very high. When the engine is running at full load, the speed of turbine and pump wheel can reach1-20,000 rpm. Its turbine shaft adopts oil-lubricated floating bearings, and there is a 1 oil circuit in the car leading to the turbocharger. Oil leakage from pipes or bearings may cause oil to seep into the exhaust pipe from the turbocharger. The exhaust pipe temperature is high, and the engine oil is baked into blue smoke.

5. There is a leak in the valve oil seal, indicating that the engine oil leaks into the combustion chamber for combustion.

Second, methods to prevent engine oil from burning

1. Use engine oil that meets the technical requirements of the vehicle. Many car owners never read the vehicle manual, and after driving for several years, they don't know what quality and viscosity grade engine oil their vehicles use, so they are very casual in the use of engine oil. Pay attention to the quality index and viscosity index when using engine oil. The quality index refers to the level above SL as far as possible, and the viscosity index should be strictly in accordance with the provisions of the viscosity index in the automobile manual, neither too low nor too high.

2. Avoid frequent rapid acceleration and long-term ultra-high-speed driving. When the engine rotates at ultra-high speed, it is easy to break the lubricating oil film, resulting in poor lubrication of the rotating parts and dry grinding. When it becomes a routine operation, it will make the engine wear abnormally, resulting in oil burning. Therefore, maintaining an economical speed is one of the best ways to prevent oil burning.

3, oil injection must conform to the specifications. When the oil injection amount exceeds the center line, the maintenance personnel should be required to pump out the excess oil. In addition, the observed amount of oil should be based on the observed amount before leaving the car the next day.

4. If you find burning oil, go to the maintenance station for inspection as soon as possible. If the engine fails (such as poor piston ring seal, valve oil seal leakage, cylinder gasket leakage, etc.). ), you should go to the maintenance station as soon as possible to check and repair the fault as soon as possible.