众所周知,发动机机油的品质在使用过程中,由于受到机械杂质的污染和自身理化性能的降低,会逐渐发生变化。这些变化降低了机油原有的润滑、清洗、冷却和密封等作用,加剧了发动机的腐蚀和磨损,使发动机的动力性、经济性、排气净化和使用寿命受到严重影响。因而,加强对在用机油的定期检测与分析,实行按质换油,具有极为重要的意义。 As we all know, the quality of engine oil during use, due to the pollution of mechanical impurities and their physical and chemical properties of the lower, will gradually change. These changes reduce the lubricating oil, cleaning, cooling and sealing the original role of the oil, exacerbated the engine corrosion and wear, the engine power, economy, exhaust purification and service life are seriously affected. Therefore, to strengthen the regular testing of oil in use and analysis, the implementation of oil by quality, with extremely important significance.