How Often Should Engine Oil Be Changed Normally?
2 Answers
Generally, fully synthetic oil should be changed every 10,000 kilometers or once a year, semi-synthetic oil every 7,500 kilometers or every 7-8 months, and conventional mineral oil every 5,000 kilometers or every 6 months. Below is an introduction to engine oil-related information: Increased fuel consumption: When adding engine oil, the oil level should be between the upper and lower limits on the dipstick. If too much oil is added, the engine's temperature will rise, causing the oil to expand in volume. This increases the pressure in the oil chamber, raises operational resistance, reduces the car's power, and increases fuel consumption. Overfilling oil: If too much oil is added, the breather pipe of the crankcase may leak oil. The increased pressure in the crankcase can loosen the oil seal due to the oil pressure, leading to oil leaks. Heat dissipation: Overfilling oil can affect the engine's heat dissipation.
I've been driving for nearly twenty years and have accumulated a lot of experience in oil changes. Generally speaking, the normal oil change interval is between 5,000 to 10,000 kilometers, or every six months or so, but this range needs to be adjusted based on actual conditions. I've used both synthetic and mineral oils myself—synthetic oil is more durable and can last over 10,000 kilometers, while mineral oil tends to thicken and degrade faster, requiring a change at around 5,000 kilometers. Driving habits also play a big role. For example, since I drive mostly on highways, the oil temperature remains stable, allowing for longer intervals between changes. In contrast, frequent city traffic with short trips leads to faster oil contamination, requiring checks every four months. Don’t forget to regularly check the dipstick—dark or thickened oil is a clear signal, helping you spot issues early and avoid engine damage. The best way to save time and money is to stick to regular maintenance and not wait for problems to arise.
