What is the function of engine oil in cars?
2 Answers
Engine oil in cars serves the following functions: Lubrication and friction reduction: It forms an oil film between two sliding components to prevent direct metal-to-metal contact, ensuring smooth operation. Cleaning and dispersion: High-quality oil can flush away surface contaminants through circulation, absorb tiny metal particles in the engine, and have them scraped into the oil pan by piston rings. Cooling: During engine operation, high temperatures are generated. When oil reaches moving parts, it absorbs heat and carries it away, assisting in component cooling. Sealing and leak prevention: It forms a sealing ring between piston rings and pistons through oil film, preventing combustion gases from entering the crankcase. Rust and corrosion prevention: Quality oil adheres to component surfaces, protecting them from contact with air, acidic substances, and harmful gases, thus safeguarding the engine from atmospheric and water corrosion.
Having driven old cars for decades, I deeply understand the critical role of engine oil. It lubricates all moving components of the engine, such as pistons sliding up and down in cylinders, reducing friction and wear to prevent seizing. During summer highway driving when the engine runs extremely hot, oil helps dissipate heat to avoid overheating damage. It also cleans internal contaminants like metal particles and carbon deposits, preventing oil passage blockages. The sealing function ensures cylinder compression, enhances power output, and prevents gas leaks. Without regular oil changes, components rust faster and service life shortens. I make it a habit to check oil level and color monthly – immediate maintenance upon spotting abnormalities extends my car's durability and saves major repair costs. Remember: only quality engine oil keeps your vehicle running smoothly.
