What is the function of engine oil in an engine?

[McNadia]

Engine oil has six main functions: lubrication and wear reduction, cleaning and dispersion, cooling and temperature reduction, sealing and leakage prevention, corrosion and rust prevention, and shock absorption and cushioning. Here is some extended information about engine oil: 1. Precautions: When prompted to change the engine oil, it indicates that after a period of use, the aforementioned functions have diminished. If lubrication and cooling effects decline and the oil continues to be used, it can cause damage to the engine, reduce its lifespan, increase the likelihood of issues, and raise maintenance costs. 2. Oil selection: The viscosity of the engine oil should be appropriate. Different grades of engine oil have different characteristics, and their performance in terms of low-temperature starting and high-temperature wear resistance and adhesion also varies.

[McAdalynn]

As someone who frequently maintains my own car, I think the role of engine oil is absolutely crucial! First and foremost, it acts as a lubricant, reducing friction between metal components, ensuring smoother operation of parts like pistons and crankshafts. Secondly, it helps cool the engine by circulating and carrying away heat, preventing overheating damage. This reminds me of that long-distance drive when I forgot to change the oil, and the temperature spiked, nearly causing a breakdown. Additionally, engine oil serves a cleaning function, trapping dust and carbon deposits to keep the internals clean. It also helps seal piston rings, preventing compression gas leaks. I check the dipstick every 5,000 kilometers to ensure the oil level is adequate, and when changing the oil, I opt for synthetic oil—though pricier, it’s more durable. In short, maintaining good engine oil extends the engine’s lifespan and saves a lot of money in the long run.

[RemingtonRose]

As a veteran driver with decades of experience, I deeply understand that engine oil primarily serves to protect the core components of an engine. It not only lubricates all moving parts, reducing wear and noise, but also acts as a coolant, carrying away excess heat through the oil passages. I remember in my younger days when I didn't know better and delayed oil changes, resulting in severe carbon buildup in the engine, which was troublesome to repair. Engine oil also prevents rust and corrosion, protecting metal components; it seals gaps, improving efficiency. Regular oil changes are crucial. I use mineral or synthetic oil, adjusting viscosity according to the season, with spring and autumn being the most suitable. Don't underestimate this – neglecting it can shorten the engine's lifespan, and the extra repair costs aren't worth it.

[SanKayden]

Last time at the repair shop, I asked the mechanic what engine oil actually does. He said it lubricates the engine internals—less friction means longer engine life; its cooling effect is exceptional, absorbing operational heat to prevent failures; plus, it cleans impurities like a filter. This taught me to regularly check oil levels, otherwise the engine wears out faster or even breaks down. Simply put, it's the guardian angel of the engine—don't slack off.