What is the purpose of engine oil in a car?

[LeLucia]

Engine oil serves several functions: 1. As a lubricant: It reduces friction and wear between moving parts, such as between the cylinder liner and piston rings, or the camshaft. 2. As a coolant: It absorbs heat generated in the engine combustion chamber and piston crown, cooling the engine and preventing overheating. 3. As a sealant: It fills the gaps between piston rings and cylinder liners to prevent pressure leakage. 4. As a cleaner: It prevents pollutants and oxide impurities produced during combustion from adhering to the engine interior, maintaining cleanliness. 5. As an anti-rust agent: It neutralizes acidic substances generated by combustion gases, protecting the engine from rust and corrosion. Engine oil, also known as engine lubricant, is often referred to as the lifeblood of a car. It consists of 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, providing certain new characteristics, making them an essential part of the lubricant.