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The main reason for burning oil
Release time:
2024-09-30
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When the engine is working, it consumes a part of the oil, which is used for lubrication when the piston is running. Refer to the national standard (GB19055/2003) "Automobile Engine Performance Test Method". When the car is running at rated speed, the consumption ratio of oil to fuel shall not exceed 3 ‰. That is to say, if the oil consumption exceeds 0.3L/1000km, it can be determined as "engine burning oil".
When the engine is working, it consumes a part of the oil, which is used for lubrication when the piston is running. Refer to the national standard (GB19055/2003) "Automobile Engine Performance Test Method". When the car is running at rated speed, the consumption ratio of oil to fuel shall not exceed 3 ‰. That is to say, if the oil consumption exceeds 0.3L/1000km, it can be determined as "engine burning oil".
1. how to distinguish whether burning oil?
Blue exhaust from the tail when driving
The oil dipstick detects excessive oil consumption.
There is blue smoke from the exhaust pipe when the cold car starts.
Main Causes of Burning Oil in 2. Automobile Engines
1. Carbon deposition
Because the domestic fuel quality is not synchronized with international standards, it is easy to form a large amount of carbon deposits in the combustion chamber during engine driving, which becomes the source of various engine problems.
Carbon deposits will be deposited in the groove of the piston, causing the piston rings to stick together, which causes the piston ring to jam and cannot be completely sealed. The "sticky" piston ring greatly reduces the oil scraping and sealing ability. In addition, the sludge will also block the return. In the oil hole, the oil cannot flow back normally, resulting in an increase in oil consumption.
Carbon deposits will aggravate the wear between the piston and the cylinder wall, causing the gap to be too large, causing oil to enter the combustion chamber.
2. Aging or damage of oil seal
The valve oil seal is corroded and aged, resulting in loose sealing.
The front and rear crankshaft oil seals are aging, and the front and rear crankshaft oil seals are in large area and continuous contact with the oil. The impurities of the oil and the continuous temperature changes in the engine gradually weaken the sealing effect, resulting in oil leakage or oil leakage.
3. Gas channeling
Poor operation of the fuel supply system and poor fuel atomization will cause fuel or a large amount of over-concentrated fuel mixture to escape into the crankcase and mix with the oil, diluting the oil.
4. The air filter is blocked
Clogging of the air filter will cause poor air intake, drop the intake pressure, form a negative pressure, and cause the oil to be sucked into the combustion chamber under negative pressure to cause oil burning.
5. The oil filter is blocked
A clogged fuel filter results in increased oil consumption.
6. The waste gas valve is blocked or damaged
The exhaust valve (oil and gas separator, crankcase forced ventilation valve PCV valve) is blocked or damaged. After the oil and gas mixture solidifies here, it will enter the intake duct along the exhaust gas recovery pipe, causing oil consumption. The plug causes an increase in oil consumption.
7. Add too much oil
Excessive oil injection, more than the upper limit of the scale will lead to increased oil consumption.
8. The throttle is dirty
Dirty throttle causes increased oil consumption.
3. how to prevent car oil burning
1. Use high quality oil
Engine oil is prone to corrosion and aging under high temperature conditions for a long time, causing the oil film to become thinner, and it is easier to go to the combustion chamber to participate in combustion. The use of high quality engine oil can greatly delay this phenomenon.
2. Pay attention to the cleanliness of the fuel oil circuit
Carbon deposits are indispensable in the combustion process of fuel, and carbon deposits are the root cause of some automobile failures, such as the aging of valve oil seals, the increase of piston and cylinder wall gaps, etc., which are directly or indirectly related to the formation of carbon deposits. Indirect relationship, so keeping the fuel oil circuit clean is of great help to prevent oil burning.
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