What does engine oil API mean?
1 Answers
Engine oil API refers to the American Petroleum Institute. The API grade of engine oil is the quality standard set by the API for engine oils. The first letter of the specification for engine oils used in gasoline engines is 'S', while for diesel engines, it is 'C'. Engine oil, also known as motor lubricant, serves to lubricate and reduce friction in the engine, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption. Engine oil consists of two parts: base oil and additives. The base oil is the main component of the lubricant, determining its basic properties, while additives compensate for and improve the shortcomings of the base oil, imparting new properties and making them an essential part of the lubricant.