What is the Automotive Engine Oil Grade Reference Chart?

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According to the SAE viscosity grade classification, there are 6 types of winter engine oils (0W, 5W, 10W, 15W, 20W, 25W), 5 types of summer engine oils (20, 30, 40, 50, 60), and 16 types of all-season engine oils (5W20, 5W30, 5W40, 5W50, 10W20, 10W30, 10W40, 10W50, 15W30, 15W40, 15W50, etc.). Introduction: Engine oil, also known as engine lubricant (English name: Engine-oil), with a density of approximately 0.91×10³ (kg/m³), serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption for the engine. It is often referred to as the "blood" of a car. Composition: Engine oil consists of two main components: base oil and additives. The base oil is the primary constituent of lubricants, determining their fundamental properties, while additives compensate for and enhance the shortcomings of the base oil, imparting new characteristics. Additives are an essential part of lubricants.