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What is the numbering system for automotive engine oil?

1 Answers

VonBrooklyn

07/28/25 8:16pm

Automotive engine oil numbering refers to the oil classification system, which consists of two parts: the grade and viscosity specification, indicating the oil's viscosity and quality. Below is a detailed introduction about automotive engine oil: 1. Overview: Engine oil, also known as engine lubricant (English name: Engine-oil), has a density of approximately 0.91×10³ (kg/m³). It serves multiple functions for the engine including lubrication and wear reduction, auxiliary cooling, sealing and leak prevention, rust and corrosion protection, as well as shock absorption. 2. Composition: Engine oil is made up of base oil and additives. Base oil is the main component of lubricating oil, determining its fundamental properties. Additives are used to compensate for and improve any deficiencies in the base oil's performance, granting it new characteristics, making them an essential part of lubricating oil.

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