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What are the classifications of engine oil?

1 Answers

WalkerRose

07/29/25 6:11pm

Engine oil is classified into: mineral oil, synthetic oil, and vegetable-based oil. The viscosity grade of engine oil is generally classified according to the international SAE standard, which includes single-grade oil and multi-grade oil. For example, SAE30 and SAE40 are single-grade oils, while SAE10W30 and SAE15W40 are multi-grade oils. Engine oil, also known as engine lubricant, serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption. It is often referred to as the "blood" of a car. Engine oil consists of two main components: base oil and additives. The base oil is the primary component of the lubricant, determining its fundamental properties, while additives compensate for and improve the shortcomings of the base oil, providing certain new characteristics. Additives are an essential part of the lubricant.

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