The reduction of maintenance costs due to the increase in labor and material costs can only reduce maintenance costs to reduce the overall operating costs, the key is to extend the use of the ESI (ExtendedServiceInterval). Usually the shortest oil change intervals, thus, extend the oil change The period is the first task, and it is also the most demanding. In the past 10 years, the typical oil change period for diesel engines in the United States has been extended by three times. The following factors have been promoted: (1) Diesel engine oil specifications have rapidly increased in recent years. Taking the API specification as an example, it has evolved from the APICF-4 specification to today's APICH-4+ specification. High-quality diesel oil can extend the oil change period of the diesel engine without any negative influence on the durability of the engine. High-quality diesel oil should have high-quality base oils, and the amount of additives is also large, and the test methods are more extensive. Although high-quality diesel oil prices are higher, its high efficiency can reduce overall operating costs. (2) Improved UnderstandOfDegradationProcess, which is linked to the specific operating conditions of the diesel engine. The oil change period of diesel engine is usually obtained from the off-road test which is time-consuming and costly. Due to a more accurate diesel oil degradation model, it is no longer necessary to assess the oil-change period of the diesel engine and a large safety factor can also be specified. A certain operation process; the lubricant degradation model is the only way to produce the evaluation results in a timely manner and has been successfully applied so far. (3) Improvements in diesel engine design and consumer awareness of proper vehicle maintenance have greatly reduced the likelihood that diesel engine oil will be unintentionally contaminated or not replaced in time. In addition to the direct economic benefits brought about by the extension of the oil change period of diesel engines, the flexible design and construction of modern high-tech diesel engines has also saved manpower and working hours, resulting in greater indirect economic benefits.
The status quo and development trend of diesel engine oil, diesel engine oil status Since the birth of CD diesel engine oil in the 50's, diesel engine oil has not changed much in more than 30 years. It was only in the 1970s that the API C Series standard for API, SAE and ASTM combined with CRC developed the Cat. 1G method to be Cat. 1G2Y, which increased the test severity.