The replacement of engine oil is an extremely important part in the maintenance of the car. Everybody often says that the engine is the "heart" of the car, so the engine oil is equivalent to the "blood" of the car. It can be seen how high the status of the engine oil is in the use of the car. status. However, many car owners do not have enough knowledge of the oil, especially when changing the oil, they find that the oil becomes particularly black, and they suspect that they are not buying fake oil. In fact, this is not the case. Normal engine oil will also turn black after a period of use. Let's let Xiao Bian introduce why the engine oil will turn black.

Everyone knows that oil is lubricated. When the engine is working, it will inevitably wear out, so it will produce some impurities more or less, and these impurities will naturally change the color of the oil when blended with the oil. Another point is that diesel fuel has always been black smoked in our impression, and some of these soot will be dissolved in the oil, which is the same color of diesel engine oil than gasoline The reason for the deep color of the motor oil.

The second is the oxidation reaction of the engine oil. Almost all the oily substances are easily oxidized by combining with the oxygen in the air, and the oil will show a deeper color after being oxidized. Of course, the oxidation of engine oil is directly related to its use time, base oil properties, and the quality of antioxidants. The oxidizing time of general high-quality engine oil is longer than that of ordinary engine oil, but no matter how good the quality is, the quality of the engine oil will inevitably be the result of oxidation, just the degree of depth and the length of time.

In the end, the oil that he had just changed didn't take long to change color, and the quality was better than before. Don't worry about this situation. Because the high-grade engine oil has a stronger cleaning ability, it can dissolve the dirt that cannot be removed by the original oil. Therefore, the color change of the oil color after replacement will be faster. As long as we change the oil again when the impurities will be replaced together, so do not worry.

Under normal circumstances, the darker and darker color of oil is a normal phenomenon, and the speed of color change depends on the grade of the oil and the usual use, so owners need not worry too much about buying fake products.

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