What causes car oil burning? How can we tell if a car burns oil?

Severe wear between the piston (ring) and the cylinder liner or water ingress into the engine will cause oil to burn. Generally, when accelerating or going uphill, black smoke from the exhaust pipe is burning engine oil.

There are many reasons for the serious loss of engine oil in a short period of time, such as broken or unelastic piston rings, damaged valve oil seals, etc.

It is mainly caused by the wear of the piston ring and the aging of the valve seal, which can be judged by observing the exhaust gas, measuring the cylinder pressure, looking at the exhaust gas and disassembling the spark plug.

How do we know if our car burns oil.

The "burning of engine oil" often refers to the fact that the engine oil enters the combustion chamber and participates in the combustion of the mixture. Burning engine oil will lead to increased carbon deposits, unstable idling, weak acceleration and increased fuel consumption, excessive emissions, and ultimately shortened engine life.

Look at the dipstick every once in a while, whether it is less and faster, usually the oil will not be significantly reduced for no reason. The color of the car exhaust can also be judged.

Burning engine oil costs the car, and the engine oil will also be reduced, and the engine needs to be repaired seriously.

First, whether the vehicle emits blue smoke.

When the piston ring sealing effect of the engine is reduced, or the residual lubricating oil on the cylinder wall is not cleaned, the excess oil will remain in the combustion chamber and be burned together with the mixture, and the exhaust gas after combustion is usually blue with a pungent burnt smell. In addition, in addition to piston ring damage that can cause oil to enter the cylinder, damage to the valve seals can also lead to oil burning. Valve seals are usually made of rubber and plastic, and when they work in a high-temperature environment inside the engine, they harden and lose their elasticity over time, and the oil will flow down the valve stem into the cylinder to participate in combustion.

Therefore, to distinguish the real sense of the engine oil failure, you can judge by the exhaust emission color.

Second, whether the oil consumption is greater than the normal consumption in a fixed cycle.

It is generally believed that the oil consumption should not exceed 1 liter for 1000 km, but different models have different regulations, which can be referred to the vehicle's maintenance manual. During the initial 10,000 km run-in period of the new car, the oil consumption may reach 1,000 km per liter; After 10,000 km, the oil consumption will remain within 1,000 km. The owner can rely on this data to observe, check the oil level before using the car and make a record, and after a cycle, you can judge whether the vehicle has an oil burning fault.

Third, whether the vehicle has oil leakage.

Leaking engine oil is not the same as burning engine oil, but they can also lead to a loss of engine oil. If you want to determine whether the vehicle has a real oil burning fault, rather than an oil leak caused by an oil leak, you must first rule out the problem of oil leakage in the vehicle. For example, the internal oil seal of the turbocharger is damaged, causing the oil to flow into the exhaust pipe for combustion and evaporation, such an oil leakage phenomenon is very hidden, and the leakage point can only be found after careful investigation.

After eliminating the phenomenon of oil leakage in the vehicle, if there is still a frequent shortage of oil, it can be basically determined that the vehicle has a fault of burning oil. The above three points are common methods for judging the burning of engine oil in vehicles, and when applying, it is necessary to judge the results after combining the three methods, rather than meeting one of the conditions to think that the vehicle has a fault of burning engine oil.

There are two situations in which the car burns engine oil:1Burn engine oil in a cold car:

When the car temperature is not fully warmed up, the engine exhaust pipe emits a lot of blue smoke, but it is normal after the car is warm. 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.

Solution: Remove the engine cylinder head and replace the valve oil seal (please rest assured, this belongs to the repair project.) The repair time is about 4-5 hours.

The cost ranges from 800 yuan to 1200 yuan, and this fee needs to be combined with your car);

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. Workaround:

According to the normal operation method, the engine needs to be lifted down for overhaul work. The repair time is about 2-4 days. The cost ranges from 5,000 yuan to 20,000 yuan, which needs to be combined with your car, and the cost is mainly high in accessories.

It is often said that cars "burn engine oil", how to judge? How to fix it? Speak thoroughly today!

If the engine oil burn is serious in the vehicle with a relatively long number of kilometers, the most direct reason is: 1. The engine valve oil seal is aging and damaged, and the oil participates in combustion through the valve to the combustion chamber or adsorbs on the valve carbon deposit. 2. The engine piston ring is aging or stuck, causing the oil to enter the combustion chamber; The most straightforward and thorough way to deal with this situation is to overhaul the engine and replace the piston rings and valve seals.

If the engine repair agent is added, select qualified fuel or change the oil label, clean up the engine carbon deposit, etc. It can slow down the phenomenon of burning engine oil, but not completely**.

In the case of a vehicle with a short mileage or under warranty, the chances of failure of the piston rings and valve seals are generally slightly smaller. When you find a problem, you must go to the 4S store in time to check and deal with it.

The main reasons for burning engine oil are:1The gasoline oil is not good and produces carbon deposits, resulting in the piston ring being stuck by carbon deposits, and the piston ring cannot scrape the oil and leave it in the cylinder; 2.

The oil return hole is blocked, and the oil cannot return to the crankcase normally; 3.Wear between the cylinder wall and the piston, the gap is too large; 4.Corrosion and aging of valve seals and crankshaft seals lead to oil leakage.

The most obvious phenomenon of burning engine oil is that the exhaust port of the rear of the car will emit blue smoke, and at the same time, the oil consumption will increase significantly, and the oil will have to be replenished in a short 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.

It is recommended to use high-quality gasoline in the process of daily use of the car, which can avoid the phenomenon of burning some engine oil, in the normal operation of the car, after the gasoline additives are oxidized, they will generate a gelatinous substance, and after the fuel injector enters the extinguishing chamber and extinguishes, it will constitute carbon deposits in the intake valve, piston top, piston ring groove, extinguishing chamber, spark plug and other parts, which will aggravate the aging of these parts and cause the burning of engine oil.

Identification method of burning engine oil:

1. Cool car burning engine oil: When you get on the car for the first time every morning, there will be a relatively thick blue smoke exhaust from the rear exhaust pipe. After a while, the blue smoke disappears, and there is generally no similar situation on the day.

2. Burn engine oil when accelerating: When the driver slams on the accelerator or steps on the accelerator when the vehicle is moving, a large amount of blue smoke is discharged from the exhaust pipe, and when the driver slams the accelerator when the vehicle is driving, the driver can see the blue smoke from the reflector on the exhaust pipe side.

3. Fill the vehicle with the phenomenon of "burning engine oil" with engine oil, let the owner go to the maintenance station to weigh the oil filter after driving 1000 kilometers, and then fill up the engine oil, and then let the owner drive 1000 kilometers. Repeated 3 times, to obtain an average value, after the run-in period of normal oil consumption can generally reach 1000 kilometers liters, if the standard is exceeded, there is a situation of burning oil.

The salient characteristics of burning engine oil in automobiles are:

When the engine is started, black smoke or thick smoke is emitted from the exhaust pipe, even when the engine is hot.

Secondly, check the oil scale, the scale drops significantly. It used to take two months or more to keep the scale unchanged, but now it takes 19 days and half a month to replenish the oil.

In this case, go to the 4S store for consultation and inspection.

At present, there are more turbocharging and piston ring anomalies. It is best to measure the cylinder pressure. If there is nothing wrong with the cylinder pressure. That might be taking into account the turbocharging aspect.

Check the engine oil every 1000 kilometers, if the loss is greater than liters, it is burning oil. Repairs are required.

Hello, is there blue smoke coming from your car?

You can know by looking at the exhaust gas, and you don't repair it yourself, so hurry up and go to the maintenance point to test it!!

In general, the performance of burning engine oil is the exhaust pipe when driving to remove blue exhaust gas, which means that too much oil enters the combustion chamber to participate in combustion. Under normal circumstances, the engine will also burn off some of the oil from the cylinder block, piston and valve lubrication, but only in small amounts. This refers to the phenomenon of burning engine oil beyond the normal range.

One is that the cylinder barrel is worn too much and the oil leaks into the combustion chamber, and the other is that the piston body is worn too much or the piston ring fails; The oil in the cylinder head is involved in combustion because the valve guide is worn out and the gap is formed, the oil leaks into the combustion chamber or the gasoline oil seal deteriorates and the tightness decreases, causing the oil lead valve to flow into the combustion chamber.

Once there is a phenomenon of burning engine oil, it must be solved in time. The most fundamental way is to disassemble the engine for repair and replace worn parts. It is not recommended to rely on additives to solve the problem. Regular maintenance, the use of qualified, suitable engine oil is the fundamental way to prevent the phenomenon of burning engine oil.

Specific performance: 1. The exhaust of the car is blue smoke.

2. The oil consumption is too high, for example, the oil consumption reaches about 1 liter after 1,000 kilometers during the run-in period.

Reasons: 1. The piston is poorly sealed, and the oil that should only exist in the cylinder and lubricate the crankshaft connecting rod enters the combustion chamber. It may be caused by wear of the cylinder or piston.

2. Poor valve oil seal, causing oil to enter the combustion chamber from the valve.

3. The oil label is selected incorrectly (the use of too thin oil is not easy to form an oil film), or the use of inferior oil filter causes impurities to enter the cylinder, resulting in cylinder wear.

Blue smoke from the exhaust pipe.

Fuel consumption rises. Check that the oil capacity is obviously off the shelf.

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 not good.

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, there is now a crankcase ventilation system (exhaust valve) on the car, which will also exacerbate the consumption of oil 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 cylinder 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 achieve with the help of high-quality engine oil and (PNF) fuel additives, which is also the key to achieving no dismantling and repairing to solve the problem of burning engine oil.

Hello! 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 not installed or the sealing is poor, and the oil on the cylinder wall enters the combustion chamber, which leads to the delay in 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.