What are the main components of engine oil?

[VanAlivia]

Engine oil is composed of base oil and additives. For mineral oil, the base oil is refined from petroleum; for fully synthetic oil, the base oil is artificially synthesized. The following are the functions of automotive engine oil: 1. Lubrication and friction reduction: It forms an oil film on the surfaces of two sliding components to prevent friction during operation and ensure smooth movement. 2. Cleaning and dispersion: High-quality engine oil can flush away dirt from component surfaces through oil flow, adsorb tiny metal fragments in the engine, and then scrape them into the oil pan via the piston oil ring. 3. Cooling: The engine generates high temperatures during operation. When the oil reaches the operating parts, it absorbs heat and carries it away, aiding in component cooling. 4. Sealing and leakage prevention: It forms a seal between the piston rings and pistons through an oil film, preventing combustion exhaust gases from entering the crankcase. 5. Rust and corrosion prevention: High-quality engine oil adheres to component surfaces, protecting them from contact with air, acidic substances, and harmful gases, thus safeguarding the engine from corrosion by atmosphere and water.

[DiJocelyn]

Engine oil is primarily composed of base oil and additives. The base oil serves as the foundation, typically making up the majority, and is refined from mineral oil or synthetically produced, responsible for lubricating engine components and reducing friction and wear. Additives play the role of a magician, incorporating various components such as detergents and dispersants to prevent sludge buildup, anti-wear agents to protect metal surfaces, antioxidants to extend the oil's lifespan, rust inhibitors to prevent corrosion, and viscosity improvers to maintain stable flow. With years of experience in car repair, I've often seen engine oil fail due to depleted additives or degraded base oil, such as decomposition under high temperatures or contamination. Regular oil changes are crucial, and choosing the right type, like synthetic oil, offers better durability, ensuring smooth engine operation.

[Finley]

In our daily car use, the composition of engine oil is quite important. It consists of two parts: the base oil, which is the main component, extracted from petroleum or chemically synthesized, serves the purpose of lubrication; additives are supplementary, such as detergents to prevent carbon deposits, antioxidants to delay aging, and anti-wear agents to reduce friction. With decades of driving experience, my advice is to choose fully synthetic oil for better resistance to high temperatures and long-distance driving. When additives are insufficient, the engine noise increases and fuel consumption rises. If you notice the oil level dropping or the color turning black during self-inspection, it's time to change the oil. Don't skimp on this expense to protect the heart of your car.

[HarleyFitz]

Engine oil is primarily a blend of base oils and various additives. The base oils lubricate the engine, while the additives handle details such as cleaning the engine and preventing rust. I've found that although synthetic oil is more expensive, it's more environmentally friendly, durable, and can even enhance performance. For daily maintenance, just choose the right viscosity and type, and remember to change the oil regularly to keep the engine healthy.