Industrial production of lubricating oil as the "blood night" of mechanical equipment, lubricating oil is invalid = machinery and equipment is invalid。Therefore, the maintenance of machinery and equipment should pay particular attention to the efficacy of lubricating oil, select high-quality oil products, select reliable supply methods, do a good job in the engineering acceptance of new lubricating oil, do a good job in the sealing and environmental pollution control work, and prevent mutual use of lubricating oil。When changing the oil, pay attention to cleaning up the old oil to prevent the original deteriorating oil from causing environmental pollution to the new oil。Attach great importance to oil testing, according to the oil testing to good quality control of new oil, in addition to specific guidance in the use of machinery and equipment maintenance and fault detection。So causeLubricating oilWhat are the reasons for deterioration？