At What Level of Darkness Should Engine Oil Be Replaced?
1 Answers
The replacement interval for engine oil depends on the type of oil used in the vehicle. Generally, full synthetic oil should be replaced every 10,000 kilometers or once a year. Semi-synthetic oil should be replaced every 7,500 kilometers or every 7-8 months. Mineral oil should be replaced every 5,000 kilometers or every 6 months. If the oil turns black, feels gritty when rubbed between fingers, has poor viscosity, or even feels rough, it should be replaced. Below are the functions of engine oil: 1. Friction reduction: A sufficiently thick oil film separates the surfaces of relatively sliding parts, thereby reducing wear. 2. Sealing: Engine oil can form a seal between the piston rings and the piston, reducing gas leakage and preventing contaminants from entering. 3. Rust prevention: Lubricating oil adheres to the surface of parts, preventing contact with water, air, acidic substances, and harmful gases. 4. Cushioning: When the pressure in the engine cylinder rises sharply, suddenly increasing the load on the piston, piston skirt, connecting rod, and crankshaft bearings, this load is transmitted and lubricated through the bearings, cushioning the impact load. 5. Cleaning: High-quality engine oil can carry carbon deposits, sludge, and worn metal particles from engine parts back to the oil pan through circulation, flushing away dirt generated on the working surfaces of the parts via the flow of the lubricating oil.
