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What are the functions of engine oil?

2 Answers

DiAngela

07/24/25 4:24pm

The functions of engine oil include lubricating and reducing friction in the engine, assisting in cooling and temperature reduction, sealing to prevent leaks, preventing rust and corrosion, and cushioning vibrations. Engine oil is composed of base oil and additives. The base oil is the main component of lubricating oil, determining its fundamental properties. Additives compensate for and improve the shortcomings of the base oil, providing certain new characteristics, making them an important part of lubricating oil. To achieve better lubrication effects, humans have chemically synthesized various types of engine oil based on base oil, known as synthetic engine oil. Synthetic oil manufacturers produce various types of engine oil according to user requirements, and the composition of synthetic oil can be altered based on different usage purposes.

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LeonardoFitz

08/11/25 9:04am

Engine oil plays a vital role in our engines. Its lubrication function is essential as it coats moving parts like pistons and bearings, reducing friction to ensure smooth operation and prevent premature wear. The cooling function is equally important; as the engine operates, it generates high temperatures, and the circulating oil carries away this heat to prevent components from overheating, melting, or getting damaged. In terms of cleaning, engine oil captures metal debris and carbon deposits, keeping the internals clean and preventing blockages. The anti-rust function shouldn't be overlooked either—it contains anti-corrosion additives to protect metal parts from rusting, thereby extending engine life. The sealing function helps piston rings seal the cylinders, reducing gas leakage and energy loss. Additionally, engine oil minimizes noise and vibration, enhancing driving comfort. Regular oil changes, such as every 6,000 kilometers or six months, can prevent major failures—neglecting this may lead to engine overhauls. Choosing the right type of oil is also crucial; for example, synthetic oil is better suited for high-temperature environments.

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