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When using the machine, its parts gradually wear out. This cannot be avoided. Both spare parts and consumables that are poured into the car have a certain service life.

In view of this, it is sometimes necessary to change the oil in the engine. All car manufacturers prescribe in the operating manual how often the lubricant needs to be changed.

However, many drivers prefer to decide for themselves when a replacement is required.

The color of the oil matters. Some believe that if the oil has turned black, then you need to buy another one. Why does engine oil turn black?

Does blackened car oil really indicate that it needs to be changed? Can I do this myself, or is it better to contact a car service?

  • Reasons why grease darkens
  • How fast does oil darken?
  • How do engine malfunctions affect oil color change?
  • How to proceed

  • Reasons why grease darkens

    Remember that when using any car oil will darken. This is due to various reasons. First of all, you need to deal with the car oil.

    Today, the lubricant that is poured into the internal combustion engine on gasoline / diesel is a liquid consisting of many components that performs various tasks in the power unit, such as:

  • Formation of a lubricating film on contacting parts.
  • Heatsink. When an internal combustion engine operates, its parts rub, therefore, the temperature increases. If there is no heat dissipation, the metal will begin to become wider. Because of this, the engine may jam.
  • Washing parts to eliminate dirt and wear effects. Due to friction, small metal shavings appear. It is abrasive and the motor wears out quickly.
  • The gases entering the crankcase from the cylinder block contain soot. Do not allow it to settle on the details.

    Metal shavings and dirt after flushing remain on the crankcase bottom or in the oil filter. The lubricant dissolves soot with the help of special additives (alkalis).

    Alkali neutralizes acids. If it is in the lubricant, foreign particles do not remain on the internal combustion engine parts. Due to the dissolution of soot and dirt in the car oil, it quickly darkens.

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    How fast does oil darken?

    Many car enthusiasts are interested in how quickly the engine oil turns black. The color of the lubricant does not directly depend on the mileage of the car. The following factors are important:

  • oil quality;
  • additive substances included in its composition;
  • engine performance;
  • its level of wear and contamination.
  • If the engine is new, absolutely serviceable, then the color change of the lubricant depends on the elements included in its composition.

    High-quality oil becomes darkened no earlier than after a couple of thousand kilometers. However, there are also many nuances here.

    Motor oil may contain various additives. If a lubricant with a low concentration of alkali is poured into the engine, flushing will take place slowly, therefore, the oil will not darken quickly.

    In any case, the grease will turn black. This does not always mean that it needs to be replaced. If the car oil remains light, think about it. Perhaps it does not flush the engine, which is why the parts become very dirty. In such a situation, it is advisable to replace the lubricant with another one.

    Remember not to drive with more oil than the auto manufacturer recommends. This is due to the fact that when driving, the oil fluid consumes its own additive substances. In view of this, over time, she does not cope with her tasks (including washing).

    Being deposited in the oil channels, dirt and soot will reduce their size and throughput. If you do not change the lubricant in time, the motor will be coked.

    The layer of dirt will become so thick that the new liquid simply cannot wash it off. This will affect the power of the engine, reduce its performance.

    How do engine malfunctions affect oil color change?

    Why does oil turn black quickly? One of the reasons for this phenomenon is the poor condition of the power unit. If the cylinder block and piston system are worn out, there is an increase in the volume of blown gases. Blackening oil becomes because of this.

    Consequences of not changing the oil on time

    If there is a problem with the power system in a gasoline engine, the lubricant will darken at an even faster rate. For example, due to incorrect adjustment, enriched fuel enters the cylinder block.

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    Due to the high volume of fuel, this mixture will not be able to burn completely. Soot will appear and settle on the cylinder walls. When the car oil washes them, it will remove the soot, but it will remain in the lubricant and change its color.

    In diesel engines, the oil fluid will darken much faster than in a gasoline-powered internal combustion engine (even if the unit is in full working order). This is due to the characteristics of the fuel system and fuel.

    When diesel burns, there is a lot of soot. It penetrates into the crankcase with burst gases. In view of this, in diesel ICEs, the lubricant darkens at a faster rate.

    If you are worried about why the oil turns black, know that this is normal. No need to worry, because darkening is a good sign if it is gradual and does not interfere with the operation of the car.

    It is much worse if the oily liquid does not change its own color. In the future, this will have a bad effect on the engine, because the dirt will clog the channels, therefore, oil starvation of the parts will begin. Because of this, the internal combustion engine jams.

    For most drivers who have changed the brand of lubricant, the question arises why the oil in the engine turned black quickly. When a low-quality oil product is poured into the engine, a lot of dirt accumulates in it.

    After pouring high-quality lubricant, it washes away all contaminants. To prevent your car oil from changing color next time, reduce the replacement interval by about half.

    It is also sometimes necessary to replace the oil filter. This will make it possible to reduce the amount of pollution. If the oil turns black quickly, the engine is likely significantly worn. A complete renovation is needed.

    Oil filter device

    In order to understand why the grease quickly turned black, you need to check the engine for performance and measure the pressure under the hood. This will allow you to determine what the true cause of the darkening is.

    How to proceed

    When using a car, the best characteristic is a gradual change in the color of the oil. The main thing is the right choice of lubricant. Car manufacturers prescribe in the operating manuals what the parameters of the optimal motor oil for the car are.

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    These recommendations must be followed. If the manufacturer recommends using synthetic/semi-synthetic water, then forget about mineral water.

    Consumables should be purchased only from trusted suppliers, choose products of popular brands. It costs more than obscure products, but ensures the engine runs smoothly.

    It is undesirable to switch to a different brand of motor oil, if there is no strong need for it. This should be done only when the lubricant does not perform its functions or is difficult to get.

    Sometimes you need to flush the power unit. For this, special washers are used. Flushing should also be carried out when switching to another brand of oil fluid.

    The washer is a conventional car oil, which contains many detergent components. Its use makes it possible to remove dirt from the crankcase before filling in new grease. Also, when flushing, the remains of the spent oil product remaining in the engine after draining are removed.

    To clean the engine before filling, it is undesirable to use traditional methods, for example, diesel fuel. It could be used on old motors with a simple design. The use of a diesel engine in a modern internal combustion engine can lead to a major overhaul.

    If, after washing the engine, the oil quickly darkens again, it is probably too clogged. To remove all the dirt, you will need to disassemble the engine, clean the oil channels with special cleaning agents.

    Changing oil filters, regulating the operation of systems, and other types of maintenance not only guarantee the uninterrupted operation of the power unit, but also increase its service life, because the amount of combustion products that pollute the internal combustion engine is reduced.

    If the grease darkens too quickly, take action, because ignoring such a problem can lead to significant malfunctions.