The engine oil turned black just after it didn t take long to change?

In fact, the oil turns black, not because there is a problem with the engine oil, nor because there is a problem with the car. We all know that the engine is like the heart for a car, so the existence of oil, just like the blood that provides power to the engine, can not only provide good lubrication to the engine, but also take away some carbon deposits and other oxides or impurities inside the engine in the process of flowing, so as to make the engine run more healthily.

The engine oil will turn black after a period of time in the engine and the oxide reacts, which is a normal phenomenon, not because there is a problem with the engine, or because there is a problem with the oil, if you run hundreds of kilometers after changing the oil, the design oil is still transparent, then you have to wonder if it is a problem with the oil, because under normal circumstances, after the car runs about 500 kilometers, the oil will turn black, if you buy it black, it is really a problem with the oil.

I hope mine can help you, and I wish you a safe drive and all the best!

Cause analysis: There are two main reasons for blackening. The first is due to the action of the detergent dispersant, and the second is due to the oxidation of the oil in use.

If an oil does not turn black during use, it means that the oil is not performing its normal cleaning function at all. Today's engine oils generally contain a cleaning dispersant that absorbs the carbon deposits and oxides of the engine oil from combustion so that they can be replaced during oil changes, thus ensuring that the inside of the engine is clean. Therefore, the blackening of the oil that has just been changed is not necessarily caused by the fact that the inside of the engine is too dirty, as long as the oil is changed at the specified time.

Solution: Change the oil and oil filter regularly. After a period of use, the viscosity of the oil becomes thicker and acidic products are produced, which will damage the engine components and affect the normal operation of the engine if not replaced regularly.

Normal. It is very normal for the engine oil to be very black, the engine oil turns black because the engine oil plays a role in the operation of the engine, in addition, when the engine is working, the temperature and pressure are very high, the engine oil has been circulating in this environment, and it will slowly oxidize and turn black.

It is not caused by the deterioration of the oil. Therefore, if the oil is very black, if you don't use inferior oil, if you don't maintain the car according to the maintenance manual, under normal circumstances, the oil is very black, it is no big problem.

The composition of the motor oil is base oil + additives. This is true for mineral, semi-synthetic or fully synthetic oils. However, these are only the base oils of engine oils, and the types and formulas of additives seem to be similar to those actually used, but they are very different.

The main role of additives in lubricating oil is to improve and enhance the various properties of engine oil, so that the oil has better lubrication, cleaning, cooling, sealing, anti-rust and anti-corrosion, cushioning and shock absorption. The types of additives can be as many as more than 10 kinds, according to the formula needs to increase and decrease the amount to meet the characteristics, that is to say, the higher the grade oil, not only the better the base oil used, the more types of additives, the better the quality and naturally.

There are many types of additives in motor oil, and one of them is called"Cleaning dispersants"。It can be chemically neutralized with gum, sludge and other chemicals in engine oil. In other words: it can remove the glue, sludge and other dirt inside the engine"Wash it down"。

The carbon deposits and oil sludge in these engines are all black in color, and the oil will naturally turn black, and after being washed off, the oil color will naturally turn black, so it is very normal for the oil to be very black.

It is precisely because of the high content of dispersant that the engine oil has a strong cleaning ability"black fast", while the oil with a low content of cleaning dispersant is just the opposite. If you use thousands of kilometers of engine oil, the color has not changed at all, and it is still crystal clear, which is abnormal, and it is likely that the cleaning ability of this engine oil is too poor, resulting in it"Nothing washes off".

It is normal for the oil to turn black. The oil is directly added to the engine, and the sludge deposits attached to the engine will be produced when the oil is working, and it is difficult to clean the sludge when changing the oil. After replacing the new oil, the new oil will mix with the circulating sludge, resulting in blackening.

Another reason why the oil turns black so quickly after a change is that the oil contains detergents and dispersants. Therefore, in addition to lubrication, oil also plays an important role in cleaning. When the engine is working, it will burn oil and mixed gas, and a large amount of carbon will be deposited during this combustion process, and the oil can clean and dissolve the carbon deposits and oxides inside the engine, so it is normal for new oil to be added to the car soon after it will produce black substances, resulting in blackening.

Therefore, it is normal for the engine oil to turn black, and friends can decide whether they need to change the engine oil according to the mileage of their car and the actual situation of the service life of the oil. But if the newly added engine oil bubbles up and slowly turns white after a short time, the owner should pay attention at this time. This is a manifestation of emulsification after mixing oil and water.

Too much moisture in the oil will make some additives ineffective, accelerate the oxidation of the oil, and turn the oil into a milky white liquid. It is recommended to check the engine water tank in time for water leakage or whether external moisture has entered the engine. If this gasoline is used for a long time, it can cause too much moisture in the engine, which can lead to an engine strike.

If the oil that has just been changed turns black after driving 500 kilometers away, one is that the engine is too dirty and the oil is not changed frequently. If it turns black after just a few kilometers, it's a problem with the quality of the oil.

In fact, the engine oil turned black not long after it was replaced, what is the reason? Hello, this is normal, it would be strange if it didn't go black. There are three reasons why the newly added engine oil will slowly turn black after you run for a few minutes:

First, the engine oil has a cleaning effect, and the internal parts of the engine will have carbon deposits, wear metal powders, etc. The second is high-temperature oxidation, which is easy to understand and does not need to be explained. The third is that the old engine oil cannot be completely cleaned, and there will definitely be more or less residue, which will turn black after mixing with the new engine oil.

In short, it is normal for the new engine oil to turn black, and it may be a fake engine oil if it does not turn black.

This is normal! In particular, diesel cars will be darker faster, and gasoline cars will be better. As long as the oil is **, there is no problem, and it does not affect its lubrication effect!

Changing the engine oil is like bathing the engine, the new oil washes off the old dirt during the circulation process, so it gets dark quickly.

Not long after the oil of the engine was changed, it turned black, what is the reason? If the engine oil turns black not long after it is changed, it may be that the oil has more impurities, so it will turn black.

The engine oil turned black shortly after it was changed, probably due to the effect of the cleaning dispersant.

It is advisable to check if the oil filter is working properly.

Hello: Engine oil is equivalent to the "blood" in the automobile engine, which flows between the engine parts, plays a lubricating role, and prevents serious wear and tear between parts and components; In addition to this most important function, it also has some "additional functions", such as cooling and cooling, cleaning and cleaning, sealing and leakage, rust and corrosion prevention, shock absorption and cushioning. The main reasons for the blackening of engine oil are as follows:

1.The quality of the fuel, the higher the olefin content in the fuel, the higher the sulfur content, the easier the formation of sludge in gasoline engines, the formation of soot in diesel engines, and the blackening of engine oil.

2.The engine structure and working conditions are different. The sludge in the oil pan of the engine oil engine is mainly caused by the car being stopped and driving, the power is not fully utilized, and the combustion does not completely occur. Diesel engines do not burn completely to form soot, which can easily cause the oil to turn black.

3.The engine is overloaded for a long time, running at high power and high temperatures, and the oil is oxidized and blackened.

4.The replacement cycle is too long, the engine load is large, etc.;

5.Change the oil without cleaning the engine or change the oil filter. After the new oil is added, the new engine oil is polluted by the clean waste oil, and the cleaning function of the new oil removes the original glue, carbon deposits, and sludge from the engine; Once mixed, mix it into the oil to make it black.

Blackened oil doesn't mean it's spoiled, and the quality of the brand** oil on the market is quite high, and it can maintain lubrication at high temperatures. Generally speaking, when new oil is added, sediments such as sludge and carbon deposits on the parts are dispersed in the oil, which will cause the oil to turn black after a certain period of time. An experienced master will use the viscosity of the oil to determine whether it needs to be replaced, rather than observing the color of the oil turning black and concluding that it needs to be replaced.

Change oil according to maintenance interval (minerals: 5000 km or 6 months, semi-synthetic: 7500 km or 9 months; Fully composited:

10,000 km or 1 year; Appropriate adjustment according to the vehicle environment), the selection of higher quality engine oil, regular cleaning of the lubrication system, etc., can effectively alleviate the blackening of the engine oil.

It is normal for the engine oil to turn black not long after it is changed, because as long as the engine is running, the oil will oxidize.

Obviously, the oil is not clean.

It is normal for the engine oil to turn black.

Engine oil, that is, engine lubricating oil, is known as the "blood" of the car, which can lubricate, clean, cool, seal, reduce wear, prevent rust and corrosion of the engine. The engine is the heart of the car, and there are many metal surfaces in the engine that rub against each other, and these parts move fast, the environment is poor, and the operating temperature can reach 400°C to 600°C. Under such harsh working conditions, only qualified lubricating oil can reduce the wear of engine parts and prolong the service life.

Steps to change the oil:

1. Operate the first motive to reach the working temperature. The vehicle is then jacked up using a jack, the handbrake is pulled up and the front wheels are squeezed up with a wooden wedge.

2. Place the old oil container under the oil pan, find the oil drain bolt of the oil pan, and slowly unscrew the oil drain bolt, being careful not to touch the hot oil. Allow the oil to drip for a while. Check the drain bolts, reinstall the drain bolts, and be careful not to overtighten the bolts to prevent damage to the oil pan.

3. Move the oil container to the bottom of the oil filter, use the oil filter element wrench to loosen the filter element, and then unscrew it by hand. If the filter is still hot, remember to wear gloves. Even if the filter element was tightened before, there is no need to worry about damaging the filter element during the removal process, as long as it does not damage the connection screws that install the filter element and the parts around the filter element, after all, we no longer use the removed filter element.

4. Refer to the user's manual to select the appropriate oil filter element.

5. Use new oil to apply the interface gasket of the new filter element. If the filter is installed vertically, you can pour some new oil into the filter, which will reduce dry grinding the next engine start. Screw the filter in by hand and tighten the filter as indicated (usually after tightening the filter by hand and then screwing it in 3 or 4 turns).

6. Pour the new engine oil into the oil pan, pay attention to the introduction of the user's manual. A funnel can be used to prevent oil from being poured on the outside of the engine. Check the lower part of the engine for leaks.

If there is no leak, put down the vehicle, check the dipstick, and start the engine, the indicator light on the gauge should turn off immediately after starting. Finally, turn off the engine and double-check the oil level and dispose of the old oil and filters according to local regulations.

The engine has not changed its oil for too long, causing too much sludge to accumulate inside the engine. It is recommended to clean the engine!

1. Some people think that once the engine oil turns black, it should be replaced: the color of the lubricating oil turns black is the realization of serious deterioration of the oil, so it must be replaced.

2. In fact, this is only for the lubricating oil that does not add a static dispersant to weigh the hand, this understanding is not comprehensive, but the lubricating oil used in modern cars is generally added with a quiet decomposer.

3. This kind of sedative will wash off the adhesive film and black carbon deposits adhered to the piston and disperse them in the oil, thereby reducing the generation of high-temperature precipitation in the engine, so the color of the lubricating oil is easy to turn black after a period of use, but this does not mean that the oil has deteriorated. This sedative washes off the adhesive film and black carbon deposits that adhere to the piston and disperses them in the oil to reduce the formation of high-temperature precipitation in the engine, so the color of the lubricating oil is easy to turn black after a period of use, but the oil is not completely deteriorated at this time.

4. In the process of using engine oil, the quality of engine oil will gradually decline due to movement, pollution, oxidation and other reasons, in order to make the lubricating oil give full play to its performance, it needs to be replaced after a certain service life

5. The general time for changing the engine oil is 5,000 kilometers, so when doing car maintenance, it is necessary to do it with the stove in the way of 5,000 kilometers or once every three months

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