What is the purpose of adding engine oil to a car?
3 Answers
Adding engine oil to a car ensures the normal operation of the engine. Engine oil, also known as engine lubricant, is composed of base oil and additives. Its functions include: 1. Lubrication; 2. Assisting in cooling and temperature reduction; 3. Cleaning; 4. Sealing and preventing leaks; 5. Rust and corrosion prevention; 6. Shock absorption and cushioning, as well as anti-wear. Engine oil is classified by viscosity into: 1. Four-stroke engine oil; 2. Two-stroke engine oil. Engine oil can also be selected based on usage conditions: 1. Diesel engine oil: Chosen according to the combined mechanical and thermal loads of the car engine and the severity of the engine's operating conditions; 2. Gasoline engine oil: Selected based on the severity of the engine's operating conditions, additional devices in the car's intake and exhaust systems, and the production year.
Engine oil is like the blood of the body for an engine. Having driven for so many years, I deeply understand its importance. Firstly, engine oil forms a lubricating film inside the engine, allowing metal parts to slide smoothly against each other, reducing friction and wear. For example, when the piston moves up and down in the cylinder, it won’t scratch the surface. Another major role is heat dissipation—when the engine runs, temperatures soar, and the circulating oil carries away heat, preventing overheating that could warp or damage components. The cleaning function is also crucial. As the oil flows, it picks up dust, carbon deposits, and metal particles, preventing them from accumulating and clogging oil passages, thereby extending the engine’s lifespan. If the oil level is too low or hasn’t been changed for too long, the engine noise increases, fuel consumption rises, and in severe cases, it may even stall or break down. That’s why it’s essential to regularly check the oil level and quality, and change it every 5,000 to 10,000 kilometers as per the manual—don’t slack on maintenance.
I think engine oil is the unsung hero of a car. Its primary role is to lubricate the moving parts inside the engine, such as the crankshaft and camshaft, ensuring they operate smoothly and preventing harsh metal-on-metal contact that could cause screeching noises or damage. At the same time, it absorbs and dissipates heat, helping the engine avoid overheating and potential damage during high-speed operation. Engine oil also has a cleaning function, carrying away sludge and other contaminants as it circulates, preventing carbon buildup that could impair performance. If you don't top it up with fresh oil in time, the engine may become sluggish, shaky, and slow to respond when accelerating. Regularly checking oil levels and changing the oil is crucial, especially during the extreme heat of summer or the bitter cold of winter. Choosing the right viscosity of engine oil can make your car run more powerfully and efficiently.
