What Materials Are Used to Make Engine Oil?

[HazelLee]

Engine oil (also known as lubricating oil) is primarily divided into two types: mineral oil and synthetic oil. Mineral oil is refined from petroleum as the base oil and then mixed with additives. Synthetic oil's base oil is chemically synthesized before being blended with additives. The following are the functions of engine oil: 1. Lubrication: Engine oil forms a protective film on the surfaces of moving engine components, ensuring smoother relative motion between parts. 2. Cleaning: Relative motion between components causes continuous wear, especially during cold starts. Circulating oil carries away debris from wear, preventing further damage. 3. Anti-wear: It reduces friction coefficients and resistance, thereby saving energy. 4. Cooling: Continuously circulating through the engine's oil passages and oil pan, engine oil provides cooling effects similar to coolant. 5. Rust and corrosion prevention: The oil film isolates components from air and moisture, preventing rust. 6. Sealing and leak prevention: Engine oil forms a seal between piston rings and pistons, preventing leaks and contamination. 7. Shock absorption: By lubricating pistons, piston pins, connecting rods, and crankshaft bearings, it cushions impact loads.