Why do some cars burn engine oil?

The so-called "burning oil" means that the oil enters the combustion chamber of the engine and participates in the combustion together with the mixture.

Generally, vehicles with the phenomenon of burning engine oil will have different degrees of exhaust "blue smoke" symptoms, oil consumption increases significantly, and the engine oil has to be replenished in a short period of time. The phenomenon of burning engine oil in the vehicle will lead to an increase in carbon deposits in the combustion chamber, a decrease in the economy and power of the vehicle, and excessive exhaust emissions.

The poor sealing of the cylinder is the main cause of oil burning. The poor sealing of the cylinder is mainly due to the excessive matching gap between the piston and the cylinder wall, the improper installation of the piston ring or the poor sealing, and the oil on the cylinder wall enters the combustion chamber, causing the phenomenon of burning oil. In addition, poor sealing performance of the valve seal, damage to the crankcase vent valve, or crankcase vent blockage will cause the oil to enter the cylinder with the crankcase gas to participate in combustion.

Causes of burning engine oil:

1. Burning engine oil in a cold car: When the temperature of the car is not completely warmed up, the engine exhaust pipe emits a lot of blue smoke, but it is normal after the car is heated. This phenomenon is caused by the aging of the valve oil seal.

Due to the decrease in temperature, the valve oil seal of the rubber material is stiff and cannot be completely sealed, and the oil leaks from the valve into the combustion chamber and burns.

2. Hot car burns engine oil: After the car reaches the normal temperature, the exhaust pipe still emits blue smoke, which indicates that the piston ring has a poor seal. Due to the poor sealing of the piston ring, the oil directly enters the combustion chamber through the piston ring leakage under the action of the oil pump, and there is a phenomenon of blue smoke from the exhaust pipe.

There are several reasons for this phenomenon, such as: material aging, carbon deposition jamming, excessive wear of cylinder liners, etc.

In addition, there is another way to deal with it: if it is determined that the oil is burning in a hot car and it is not very serious (for safety reasons, the cylinder pressure test can be carried out first), the oil pan can also be removed directly, the piston can be directly taken out, and the piston ring can be replaced, so that the cost and time are similar to the first solution.

2010-03-04 15:24 There are two kinds of engine oil: one is caused by the valve oil seal, the valve oil seal burns the engine oil, and the general cool car is the exhaust pipe blue smoke is heavier, and the hot car is lighter.

One is the burning of engine oil caused by the piston ring, the piston ring burns the engine oil, and the exhaust pipe does not come blue when the car is cool, and the exhaust pipe is heavier after the hot car. You're probably talking about the blue smoke caused by the piston rings. The main phenomenon of burning engine oil is the exhaust pipe emitting blue smoke, and the oil consumption in the engine is significantly increased.

There are two reasons for this: First, natural wear and tear. With the increase of the mileage of the car, the wear between the piston and the cylinder gradually increases, when the wear increases to a certain extent, the cylinder blow-by will begin, and then the phenomenon of burning engine oil will occur.

When the valve oil seal is damaged, it will make the oil burning phenomenon more obvious. 2. Improper maintenance 1. Maintaining the engine according to the specified mileage will prolong the service life of the engine. On the contrary, even if the mileage is exceeded and not insured (i.e., the insurance is delayed).

If the oil is too dirty, the impurities in the oil will accelerate the wear of the engine cylinder. 2. Too much oil is added. 3. Improper selection of air filter element, machine filter element, engine oil, etc., the gas impurities entering the cylinder can not be well purified, and all kinds of dust particles enter the cylinder, accelerating the wear of the cylinder.

The quality of the filter element is poor and does not play the role of the magazine in the filter oil. Counterfeit engine oil or the oil used does not match the oil grade of the vehicle used, so that it will not be able to form a good oil film on the friction surface of the engine. 4. The ignition time is too early or too late.

Premature or late shock will increase the temperature of the engine, and in severe cases, the piston will fall off the top and the cylinder block will be scrapped. In its initial stage, there will be serious cylinder blow-by gas and burning engine oil. 5. There is too much dirt in the water tank in the cooling system.

The radiator and condenser are too dirty, which reduces the ventilation and heat dissipation capacity, and increases the normal working temperature of the engine. Due to the high temperature, the quality of the oil film produced by the lubricating oil during friction decreases, and the wear of the cylinder is intensified. To sum up, in addition to the natural wear and tear of the vehicle with the increase of vehicle mileage and the generation of engine oil, active maintenance and reasonable use of the vehicle can avoid the early arrival of the cylinder blow-by phenomenon and prolong the service life of the car.

There are many possible reasons why an engine burns oil, and the most common ones are the following:

1. Use engine oil with poor quality or viscosity grade that does not meet the requirements. In addition, too low or too high oil viscosity can lead to poor engine lubrication, increased wear of piston rings and cylinder walls, and reduced sealing performance, resulting in oil burning.

2. The matching gap between the piston ring and the cylinder wall is too large, the piston ring is improperly installed or the sealing is poor, and the oil on the cylinder wall enters the combustion chamber, causing the phenomenon of burning the engine oil; In addition, poor sealing performance of the valve seal, damage to the crankcase forced draft valve (PCV) or crankcase vent blockage can cause excessive pressure in the crankcase to cause the oil to enter the cylinder with the crankcase gas and participate in combustion.

3. Burning engine oil caused by excessive oil filling. When the oil is filled above the center line, the part of the engine lubrication process that passes through splash lubrication will be too much into the combustion chamber due to the high oil pressure.

4. Oil leakage from turbocharger. The turbocharger is mounted at the front of the exhaust pipe and operates at a very high temperature, and the turbine and pump wheels can reach 120,000 revolutions per minute when the engine is running at full load. The turbine shaft has oil-lubricated floating bearings, and the car has one oil passage to the turbocharger.

Oil leaks from pipes or bearings can allow oil to seep from the turbocharger into the exhaust pipe. When the exhaust pipe temperature is high, the oil is baked and discharged into blue smoke.

5. There is leakage in the valve oil seal, which means that the oil leaks into the combustion chamber through the valve oil seal.

The use of BOD "Magic Press" engine protective film can effectively prevent and solve the problem of burning engine oil in the early stage of the car, and give your car the effect of protecting it as soon as it starts.

In summary, there are four reasons for burning engine oil, using the wrong oil, design defects, parts quality defects, normal oil consumption, wrong oil specifications, or poor quality, resulting in poor high temperature stability and low viscosity value. The problem of parts is that the sealing is not good, so it will burn the oil, and the design defect is the design problem inside the engine, for example, there are small holes in the steel wall of the German car, and there will be the possibility of burning the oil, what we can do is to choose the right oil specifications and use the oil well. Germany's GT engine oil is PAO base oil, and the high temperature stability is very good, and my Volkswagen god car has not burned engine oil until now.

The engine oil itself has a certain amount of consumption, and excessive consumption is the problem of burning engine oil. There are many factors that affect the burning of engine oil, such as: fuel quality, driving conditions, driving habits, maintenance habits, etc., the following reasons will aggravate the oil consumption and cause the burning of engine oil, so that the vehicle appears:

1. Carbon deposition occurs in the combustion chamber, which makes the gas ring of the piston ring stuck, and the sealing is poor.

2. Oil sludge is generated in the lubrication system, and the oil sludge blocks the oil return hole of the oil ring and weakens the oil scraping performance.

3. Wear occurs between the piston and the cylinder wall.

4. The valve seal is corroded and aging, and the sealing performance fails.

In addition, cars now have crankcase ventilation systems (exhaust valves), which can also exacerbate oil consumption if there is a problem.

Precautionary measures for burning engine oil:

1. Use high-quality engine oil

Engine oil is very easy to corrode and age in a long-term high temperature state, resulting in the oil film becoming thinner, and it is easier to escape to the combustion chamber to participate in combustion, so the use of high-quality engine oil can greatly delay this phenomenon.

2. Pay attention to the cleanliness of the fuel circuit

Fuel in the combustion process is indispensable to produce carbon deposits, and carbon deposits are the root cause of some car failures, such as the aging of valve seals, piston wall clearance, etc., all have a direct or indirect relationship with the formation of carbon deposits, considering the relationship between domestic oil products, it is necessary to use high-quality engine oil and (PNF) fuel additives to achieve, which is also the key to achieve no dismantling and repair to solve the problem of burning engine oil.

The direct cause of oil burning is the passage of oil into the combustion chamber between the piston and the cylinder, and from the carburetor intake duct through the crankcase ventilation into the combustion chamber. At present, the lubrication of the engine adopts a combination of pressure lubrication and splash lubrication, and the air pumping wall adopts splash lubrication. When working, the cylinder wall, piston ring and piston are covered with oil, when the three cooperate normally, the oil will not go up; When the three are not properly matched, the oil between the cylinder wall and the piston will escape into the combustion chamber, which is the main cause of oil channeling.

If you have any questions in the selection of cars, it is recommended that you pay attention to the car quality network, I hope mine can help you.

Burning engine oil belongs to normal wear and tear, usually pay attention to maintenance, brand and quality of engine oil. Do not allow the engine to get hot. After a long time, the piston ring is aligned or the gap is large, the valve guide gap is large, and the oil seal is hard, which will lead to burning oil.

The aging of the valve oil seal and the aging of the piston ring will cause the seal to be not tight and burn the oil.

The damage of automobile burning oil to the vehicle is very large, which will damage the vehicle oxygen sensor too quickly, resulting in an increase in carbon deposition in the combustion chamber, unstable idling, weak acceleration, increased fuel consumption, excessive exhaust emissions and other adverse consequences, resulting in a significant increase in maintenance costs, and even potential accidents.

The phenomenon of burning engine oil in automobiles.

1. When driving, the tail exhaust exhaust gas is discharged, which means that too much oil enters the combustion chamber to participate in combustion.

2. The oil dipstick detects that the oil consumption is too fast.

The reason why the car burns engine oil.

1, is the reward of wear, that is, the normal phenomenon of the vehicle after a certain number of kilometers, the general vehicle is about 200,000 kilometers, different cars, different people use, different areas (air dust content) have a great impact on the service life of the engine, for more than a certain service life and kilometers of normal wear and tear of the vehicle, the overhaul needs to be overhauled.

2. The use of unqualified engine oil, the failure to replace the oil and the oil cleaner within the expiration date, the big throttle start of the cold car, the operation under the lack of oil for a long time, the operation under the high temperature condition for a long time, the operation under the long-term overload and high speed, the operation under the condition of poor air quality and the expiration of the air cleaner, the insufficient oil pump force, the oil pressure is too low, the oil passage is blocked, etc., will also cause the engine to burn oil.

3. The wear of the cylinder liner and piston will make the gap of the cylinder wall larger, causing part of the oil to flow into the combustion chamber for combustion, resulting in the burning of engine oil.

4. The wear of the piston ring, the elasticity of the piston ring is weakened or broken, and the piston ring is matched (several piston rings are in a straight line), resulting in poor sealing and part of the oil entering the combustion chamber for combustion.

5. The aging and damage of the valve oil seal will also allow some oil to enter the combustion chamber for combustion, especially the aging and damage of the intake valve oil seal is more likely to allow the oil to enter the combustion chamber for combustion.

Abnormal wear or bad oil can easily cause oil burning.

Hello! The car must still burn engine oil, and it must still be oil, and there is more lubrication and combustion.

Reasons for burning engine oil: long-term unclean oil circuit, untimely replacement of antifreeze, and too long oil service cycle.

The harm of burning engine oil: it will continue to generate greater carbon deposits, which will seriously pull the cylinder. The three-way catalytic converter is completely damaged in the poor combustion exhaust gas,,, and the continuous life-sustaining oil will eventually cause the engine to burst the cylinder.

The three points of the car that burn the engine oil will inevitably occupy one point, and the most important point is the high temperature caused by the oil circuit not being effectively cleaned.

Causes of piston ring seizure.

The stuck piston ring will be used with any oil, because the oil scrape is not clean, and the oil remains on the cylinder wall, causing the oil to participate in combustion, and the phenomenon of burning the engine oil, so replacing the oil with a thicker oil film is just to cover the ears and steal the bell. Among them, the cylinder wall will be seriously worn due to the delay in processing, and the engine will have to be disassembled.

In fact, the treatment principle of piston ring stagnation should start from the oil circuit, the reason for the stagnation is the beginning of the oil circuit, the oil bearing temperature is 110 degrees, and the high temperature caused by the long-term unclean oil circuit makes the oil at a temperature of 120 degrees or higher for a long time, so that the oil will be exhausted in advance, the small hole of the oil ring is very small, and the oil inside will be dried and scabbed for a long time, and a cylinder stuck is 5000 kilometers of a liter of oil, at this time, the working conditions of other cylinders will also begin to be bad, and soon the 4 cylinders will be stuck. It becomes a liter of engine oil for 1000 kilometers or even hundreds of kilometers. Therefore, in order to solve the problem, we must start from the root oil circuit, which is the way to remove the root.

At present, the effective method is to use the oil repair agent of the original solution of the company to clean the oil circuit and the cylinder, and release the carbon sludge stuck in the piston ring by penetrating into the piston ring. For most of the vehicles where the piston ring does not have a counterpart, the stagnation can be completed as long as it is repaired in this way, and the oil wiping function can be restored to improve the phenomenon of burning oil.

My colleague's car is also burning engine oil, the exhaust valve is fine, the plan is to release the piston ring, directly use the general liquid burning oil repair agent, after 5 times in a row, from the previous 1200 kilometers plus a liter of engine oil to the current 6000 kilometers without adding oil, the price comparison, the overhaul is the most such an effect. The cost is only one-tenth of that of an overhaul, and the residual value of the car is maintained.