What is the reason why car engines burn oil

The causes of engine oil burning in automobile engines are aging of valve oil seals, natural wear, failure to maintain the engine as required, improper selection of engine filter elements, use of unqualified engine oil, clogged air filters, excessive dirt in water tanks, low oil quality, abnormal sealing of piston ring, and excessive oil addition.

Aging of valve oil seal: The valve oil seal is corroded and aged, and the sealing is not tight. Oil leakage from the valve into the combustion chamber can cause oil combustion. Car owners should pay attention to regularly replacing the gasoline door seal.

Natural wear: As the mileage of the car increases, the wear between the piston and cylinder gradually increases. When wear increases to a certain extent, the cylinder will start to leak, and then oil burning will occur. Regularly replace the piston and go to the 4S store for maintenance.

Failure to maintain the engine according to regulations: Failure to maintain the engine in a timely manner beyond the mileage can cause the oil to become dirty, and impurities in the oil can accelerate the wear of the engine cylinders. Pay attention to maintaining the engine according to regulations.

Improper selection of engine filter element: Improper selection of engine filter element results in poor purification of gas impurities entering the cylinder, and various dust particles entering the cylinder, accelerating cylinder wear. Select the appropriate engine filter element.

Use of unqualified engine oil: If unqualified engine oil is used, the engine oil and oil filter will not be replaced for a long time. When the weather is cold, the engine will start at a high throttle and run without engine oil for a long time.

Air filter blockage: If the air filter is blocked, it will cause poor intake air, thereby reducing intake pressure and forming negative pressure, causing oil to be sucked into the combustion chamber under negative pressure, causing oil combustion. Regularly clean or replace the air filter.

Excessive dirt in the water tank: In the cooling system, the dirt in the water tank is too large, and the radiator and condenser are too dirty, which reduces the ventilation and heat dissipation capacity and increases the normal operating temperature of the engine. Due to the high temperature, the quality of the oil film produced by the lubricating oil during friction decreases, and cylinder wear intensifies, leading to oil combustion. Car owners should pay attention to regularly cleaning the dirt in the water tank.

Low oil quality level: if the oil quality level is low, it will lead to increased wear. In addition, if the oil viscosity is too low or too high, it will lead to poor engine lubrication, increased wear of piston ring and cylinder wall, decreased sealing performance, and oil burning. It is recommended to replace it with high-quality engine oil.

Abnormal sealing of piston ring: if the car runs to normal temperature, but the exhaust pipe still emits blue smoke, this means that the piston ring seal is abnormal. Once the sealing effect of piston ring is poor, it is easy to cause oil burning. When this problem occurs, it is usually necessary to overhaul the engine and replace the piston and piston ring.

Excessive oil addition: Excessive oil will increase the engine's running resistance and affect the normal operation of the engine; Excess oil will also enter the cylinder for combustion, causing "oil combustion" and affecting the normal function of the exhaust gas purification device; It will also increase the working pressure in the oil pipeline, accelerate the loss of seals, and ultimately lead to oil leakage; It may also directly cause an abnormal oil malfunction alarm, resulting in the engine not working properly. Use a syringe and plastic tube to suck out excess oil.