18 50,000 kilometers of old cars, do you need to increase the viscosity when you change the engine o

Causes of vehicle oil burning and how to prevent it.

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.

Increasing viscosity can slightly reduce oil channeling in the cylinder.

It increases the pumping time of the oil and slows down the lubrication of the entire engine.

Additional mechanical wear and tear may occur on the valve mechanism.

Yes, the effect is not very obvious.

Additional mechanical wear and tear may occur on the valve mechanism.

Hello, burning engine oil is caused by mechanical reasons, changing engine oil, there is no point.

To add the oil according to the instruction manual, the shaking is caused by the accumulation of carbon powder in the combustion chamber, and it will be much more effective to clean up.

Not much impact! When changing the engine oil, drivers should pay attention to the fact that the engine should be cleaned before changing the engine oil of different brands. Clean the original old engine oil, and then add engine cleaning fluid to clean it to avoid engine damage caused by oil mixing.

Whenever possible, a less viscous oil should be used to keep the oil path clear. For example, in the high temperature season or under the condition of severe engine wear, the selection of high viscosity oil is conducive to the formation of oil film and reduces engine wear.

1.Fully synthetic engine oil: Fully synthetic engine oil has better high and low temperature performance, longer oil change interval and is suitable for more severe car conditions, suitable for luxury high-performance vehicles, and is replaced at about 10,000-12,000 kilometers.

2.Semi-synthetic engine oil: The replacement cycle of semi-synthetic engine oil is generally about 8000-10000 kilometers, and the performance is moderate.

3.Mineral oil: This type of oil generally needs to be replaced after about 5000 kilometers.

Try to choose multi-grade oil, multi-grade oil has a better protection effect on the engine due to saving, long life and high efficiency.

Use it once in a while, use it twice with a high viscosity, and it's okay to change it back. After using high viscosity for a long time, it can't be replaced.

There is no impact, as long as it meets the standards of the engine. I'm really looking forward to it.

If the engine is in normal condition, there will be no problems!

However, too much engine clearance will lead to oil lamp alarm, insufficient oil pressure and other phenomena!

Hello, the current number of people consulted may not reply in a timely manner, if it is a vehicle failure problem, it is recommended to use the computer to detect the specific cause of the failure, search for "car master" can consult car problems at any time, 24 hours ** answer.

Look at how long you use high-viscosity oil, if the time is too long, it is not recommended to reduce viscosity, the use of high-viscosity oil will cause the gap between the cylinder and the piston to become larger, and then change back to low-viscosity oil, the oil film is thinner than that formed by high-viscosity oil, and the gap between the cylinder and the piston that has been increased before cannot be recovered, and the low-viscosity sealing decreases, and the oil will flow into the combustion chamber from the gap to burn.

If a new car uses a high-viscosity oil for a shorter period of time, you can switch back to a low-viscosity oil.

Regarding the question of changing the viscosity from high to low, I consulted the R&D engineers at LIQUI MOLY's headquarters in Germany, and their reply was to change to the viscosity 5w-40 is no problem (also from 0w-40 to 0w-30).It means that it doesn't matter how you change it, as long as it is allowed on the car manual. In fact, if you think about it, those who say that using high-viscosity oil will cause the gap between the cylinder liner and the piston to become larger, mean that the wear of the engine with high-viscosity oil will be greater than that of low-viscosity oil?

This is against common sense.

Personally, I think that if the engine of the car is running normally, the oil is not burned, and the power output is stable, there is no need to change the high-viscosity oil.

If the viscosity is too high, the noise of the engine may increase, the internal resistance of the engine will increase, and the fuel consumption will also increase.

If the viscosity of the oil is too low, the noise of the engine heating may increase, and the wear of the parts will increase.

In addition, the choice of engine oil is very particular, and the owner can choose the engine oil in combination with the local maximum and minimum temperature, the grade of the vehicle and the driver's nuclear condition.

However, if it is found that the car has slightly burned oil or the power output has been reduced, the wear has been more serious, and the matching gap has been large, you can choose a higher viscosity oil to strengthen the sealing performance of the fittings.

<> "The car is a thing that needs constant maintenance to always be healthy and accompany you, and the purpose of maintenance is to discharge the dirty oil and impurities in the engine and replace the oil with better lubrication effect. The original factory of the car is 0w-20 engine oil, but I heard the old driver say that the car after 100,000 kilometers must be changed to 5w-30 engine oil with greater viscosity, otherwise it will lead to poor engine lubrication and easy to break. Regarding this problem, today I will share with you my maintenance experience of using the car until now, I hope to help you.

In fact, I have heard this statement before, because the wear and tear inside the engine of our car has always existed during use, but the lubrication of organic oil makes this wear to a minimum. However, with the continuous increase of mileage, the gap between various parts will become larger after the internal wear of the engine to a certain extent, which will directly affect the power and fuel consumption of the car. Because the internal gap has become larger, it is obviously not suitable to use the original engine oil, so it is necessary to use a higher viscosity oil to ensure that the engine does not further accelerate wear.

However, a normally maintained family car, it is far from a short 100,000 kilometers to wear out the engine to the point that the gap in the internal structure becomes larger to the point of affecting the power. Generally speaking, this problem will only occur in those old cars that have driven hundreds of thousands of kilometers, and this kind of car needs to change the oil with higher viscosity. Xiao Li: My own car has been driving 120,000 kilometers at present, so I will share my maintenance experience with you.

In addition to the free 2 maintenance in the 4S shop, I have always done maintenance in the repair shop, and the original factory of my car is 0w-20 engine oil, so I have always used fully synthetic 0w-20 engine oil outside. But sometimes I think 0w-20 oil is too expensive and a little unbearable, I will occasionally change to 5w-30 oil to use, and every time I keep 10,000 kilometers to maintain, anyway, I use 0w-20 when I am in a good mood, and I use 5w-30 when I have no money. In a blink of an eye, the car has been 8 years old, the engine is normal, and the fuel consumption has not changed significantly.

Although my car has been more than 100,000 kilometers, I will continue to use 0w-20 engine oil for a long time in the future, after all, this viscosity oil is better than 5w-30 viscosity oil. In the future, if I have the opportunity to drive hundreds of thousands of kilometers, I will definitely change to a higher viscosity oil, but for now I will still maintain the maintenance habits that I would never guess before. Don't deliberately worry about what viscosity oil to use, how to use it as specified in the maintenance manual, and try to keep using fully synthetic engine oil is the best protection for the engine.

There are two aspects of engine oil, one is internal consumption, which is what we often call burning engine oil; The second is external leakage. Some of the phenomena of burning engine oil are also difficult for us to detect, such as the leakage of the valve oil seal on the cylinder head, the oil enters the intake pipe and participates in combustion in the cylinder, and the oil-water separator is damaged, so that the oil enters the intake pipe to participate in combustion.

But if it is not because of the burning of engine oil, it is an external leakage, which can be caused by many reasons, such as valve chamber cover gaskets, oil radiators, turbochargers, oil pan gaskets and other parts of the damage or poor sealing.

1000 kilometers of one liter of engine oil needs to be repaired, which obviously reduces the oil, as mentioned above, either internal leakage, burning oil, or external leakage, both of which need to be inspected and repaired.

Eliminate the existing problems as soon as possible to avoid damage to other parts, such as burning engine oil, which will cause the vehicle oxygen sensor to be damaged too quickly, resulting in increased carbon deposition in the combustion chamber, unstable idling, weak acceleration, increased fuel consumption and other undesirable conditions.

The role of motor oil:

1. Lubrication: The oil forms a continuous oil film between all the friction surfaces of the moving parts to reduce the friction between the parts.

2. Cooling: The oil flows through the working surface of the parts during the circulation, which can reduce the temperature of the parts.

3. Cleaning: The oil can take away the metal debris generated by the friction surface and wash away the carbon deposits deposited on the cylinder, piston, piston ring and other parts.

4. Sealing: The oil film attached to the cylinder wall, piston and piston ring can play the role of sealing and leakage-proof.

5. Anti-rust: engine oil has the effect of preventing rust of parts.

6. Shock absorption and buffering: when the pressure of the engine cylinder port rises sharply, the load on the piston, piston chips, connecting rod and crankshaft bearing is suddenly aggravated, and the load is transmitted and lubricated by the bearing, so that the impact load bears plays a buffering role.

7. Anti-wear: adding lubricant to the friction surface can reduce the friction coefficient, thereby reducing the friction resistance and saving energy consumption.

Burning engine oil is a hardware problem, such as cylinder, piston, piston ring bright and spring wear; Worn valves and ducts, damaged oil seals; Air booster leakage. High-quality engine oil can delay wear and tear and prolong the life of use, but it cannot solve the problem of burning engine oil.

The increase in oil consumption indicates that the above problems are gradually becoming serious. The oil consumption will increase, the blue smoke will be discharged, the fuel consumption will increase, the power will decrease, the noise will increase, and the acceleration will be sluggish. Strict respect and resistance will cause the engine to not start and run normally.

Therefore, according to the engine requirements, it is necessary to choose the right high-quality engine oil.

If the viscosity of the original engine oil is relatively low, you can choose the pure engine oil with high viscosity, and the engine oil can be selected with high viscosity, which can be taken to alleviate the oil loss. However, it is also a symptom rather than a cure, and the overall engine oil has little impact.

There are many reasons for burning engine oil, but the result is that the engine oil enters the combustion chamber and is called burning engine oil, so the engine oil should be burned or burned when changing the engine oil.

Is it true that older cars use higher viscosity oil to reduce wear? Why?

Generally, there are two simple indicators for judging the new and old vehicles, one is the age of use, and the other is the mileage. However, it is not so simple to judge the quality of the engine, and the engine with less mileage is not necessarily better, and it is very important to choose the right oil for the old car.

Generally speaking, with the increase of mileage, the various parts of the engine will have different degrees of wear, and the gap between the parts will also increase, if you continue to use low-viscosity oil, it may cause problems such as insufficient power, increased noise, idle jitter, and increased fuel consumption.

Moreover, after the number of kilometers increases, the seals will gradually harden, resulting in poor sealing, which will lead to part of the oil channeling into the combustion chamber to participate in combustion, increasing oil consumption. The oil with higher viscosity has a higher oil film thickness, and we press it by hand to pinch it more sticky, so the oil has high viscosity and a thicker oil film, which can bring better cushioning and shock absorption performance to the engine with more mileage, which reduces the noise of the engine, and the oil film thickness is better, which can give the engine better sealing performance, and can also slightly increase the power of the engine with a longer life.

It may be thought that a high-viscosity oil can provide a stronger oil film, and for parts with large gaps, a high-viscosity oil film can be used to fill in to improve air tightness. In fact, the strength and toughness of the oil film is not equal to the thickness of the oil film, not to mention the wear protection of the parts, thanks to the chemical effect of the anti-wear additives of the engine oil, and the moderate thickness of the oil film.

If it is an old car in good condition, it is enough to continue to use the original viscosity and grade of oil. If you feel that the vehicle is aging and the engine is weak and you switch to a higher viscosity oil, it will increase the resistance of the machinery and make the already weak engine even more unable to exert power, and from this point of view, the use of high-viscosity engine oil is not beneficial but harmful.

From the above two aspects, the old car does not necessarily use high viscosity oil, but according to the use of the vehicle engine and the characteristics of the oil, the choice of oil is very important.