The status quo of the composition of lubricants has clearly shown that various types of internal combustion engine oils are the most important category of lubricants in all countries in the modern world. Their consumption accounts for about half of the total amount of lubricants. At the same time, the performance requirements of internal combustion engine oils are relatively low. Comprehensively, its quality supervision requirements are also high, and the development is also relatively fast. Therefore, it should naturally be analyzed as a typical category.

The quality level of lubricants in a country and a company can be mainly reflected by the quality level of its internal combustion engine oil. Therefore, we observe the quality development of lubricating oil. We should mainly look at the quality of internal combustion engine oils, especially the gasoline engine oils and diesel engine oils. Engine oil quality and quality supervision requirements for internal combustion engines The quality of internal combustion engine oils can be analyzed mainly from their viscosity properties and various performance properties.

The quality of modern vehicle internal combustion engine oil is characterized by both its viscosity grade and its engine performance rating. Viscosity is the most basic characteristic of all lubricating oils, reflecting which load and operating speed the oil is suitable for and the ambient temperature. Performance is an increasingly attractive performance of modern vehicle engine oils (also all kinds of internal combustion engine oils), reflecting the degree to which the oils can adapt to the harsh operating conditions of the engine; as modern human society increasingly emphasizes efficiency and energy saving. With environmental protection, advances in internal combustion engine technology are advancing with each passing day, engine operating conditions are increasingly demanding, and the quality requirements for the performance of internal combustion engine oils have been upgraded once every few years. This has become a primary concern and will be the focus of our discussion.

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