How Often Should Engine Oil Be Changed for Sedans?
3 Answers
Sedans should change mineral oil within 5,000 kilometers; semi-synthetic oil within 7,500 kilometers; and fully synthetic oil within 10,000 kilometers. More information about engine oil is as follows: 1. Introduction: Engine oil, motor oil, or engine lubricant is a substance enhanced with additives in base oil, mainly containing anti-wear additives, detergents, dispersants, and multi-grade oil viscosity index improvers. 2. Function: The main functions of engine oil are to reduce friction and wear of moving parts, and to remove sludge (one of the functions of dispersants) and varnish (detergents) from the engine. Engine oil also neutralizes acids produced from fuel and lubricant oxidation (detergents), improves the sealing of piston rings, and cools the engine by carrying away heat from moving parts.
When it comes to oil changes, I believe it mainly depends on driving habits. I used to drive long distances on highways frequently, and the oil could last longer—I've even gone 10,000 kilometers without issues. But after moving to the city, with daily short trips and traffic jams, the oil gets contaminated faster, so I have to change it every 5,000 kilometers. Delaying oil changes increases engine wear, accelerates aging, and makes the engine noisier. Regularly checking the dipstick color is crucial—if the oil turns black or thick, change it early. Don’t just rely on the manual’s reminder; actual driving conditions matter more. Developing a habit of checking every six months can save a lot on repairs. A well-protected engine runs smoother.
Regarding oil change intervals from the perspective of oil types: Having driven different types of vehicles, I've found that synthetic oil lasts longer and can be changed every 10,000 kilometers without issues. Conventional mineral oil requires more frequent changes, approximately every 5,000 to 7,500 kilometers. Higher quality oil with better high-temperature resistance keeps the engine quieter during operation. Driving smoothly without aggressive acceleration also slows down oil consumption. By the way, the benefits of regular maintenance include preventing carbon buildup through timely oil changes, extending engine lifespan, and making the car more fuel-efficient and worry-free.
