Over time, the performance of lubricating oil will become worse and worse, which will have a serious impact on the engine, such as the rapid growth of sediment engine, the decline of dynamic performance, early wear parts, and finally lead to failure. In order to ensure the long-term normal operation of the engine and reduce the wear, the lubricating oil must be changed in time according to the regulations. How to judge whether the oil is bad?

　　1.光照法

　　1. illumination method

　　在晴朗的日子里，用螺丝刀把油以45度角提起水面。比较阳光下，观察油滴的情况，在光线下，可以清楚地看到没有磨屑的润滑油是好的，可以继续使用，如果磨屑太多，应更换润滑油。

　　On a clear day, use a screwdriver to lift the oil at a 45 degree angle to the surface of the water. Under the sunlight, observe the oil drop. Under the light, it can be clearly seen that the lubricating oil without debris is good and can be used continuously. If there are too many debris, replace the lubricating oil.

　　2.油流观察法

　　2. Oil flow observation

　　拿两个杯子,其中一个需要检查润滑油,空在桌面上,另将装满润滑油量杯离开桌面30 - 40厘米高,瘦,让油流动缓慢的空杯,观察流情况下,当润滑油流动应该是又细又长,制服,连续的,如果出现石油流快和慢,有时大流动,润滑油已经恶化。

　　Take two cups, one of which needs to check the lubricating oil, empty on the table top, and another empty cup filled with lubricating oil that is 30-40cm high and thin from the table top, making the oil flow slowly. When observing the flow, when the high-quality lubricating oil flow should be thin and long, uniform and continuous, if the oil flow is fast and slow, sometimes large flow, the lubricating oil has deteriorated.

　　3.油滴痕迹法

　　3. Oil drop trace method

　　拿一块干净的白滤纸,滴几滴油在滤纸上,等待石油泄漏,如果有黑色粉末表面接触电阻的手有一种感觉,它表明有很多杂质在石油,石油没有奔驰汽车维修商店好粉,用手触摸干燥光滑,和黄色的标志。

　　Take a clean white filter paper, drop a few drops of oil on the filter paper, and wait for the oil to leak. If there is a feeling that the black powder surface contacts the resistance hand, it indicates that there are many impurities in the oil. The oil is not as good as the Benz car repair shop. Touch the dry, smooth and yellow signs with your hand.

　　汽车润滑油在保养中使用的频率非常高，高质量的润滑油不仅可以保护发动机，减少磨损，还可以减少机油的更换次数，从而降低润滑油的成本。

　　The frequency of automobile lubricating oil used in maintenance is very high. High quality lubricating oil can not only protect the engine, reduce wear, but also reduce the number of oil changes, thus reducing the cost of lubricating oil.

　　济南哪里修奥迪比较，我们公司维修奥迪，奔驰，欢迎来店维修保养。

　　Jinan where repair Audi is more professional, our company professional repair Audi, Mercedes Benz, welcome to the shop repair and maintenance.