The selection of oil change intervals should be comprehensively determined based on the type of engine oil, vehicle usage conditions, and driving environment. If mineral oil is used, It is best to change it every 5,000 kilometres or 6 months (whichever comes first). Semi-synthetic oil can be extended to 7,500 kilometres or 8 months, making it suitable for family cars used for daily commuting. Fully synthetic oil offers the most stable performance, with a recommended change interval of every 10,000 kilometres or 12 months, particularly for turbocharged or high-performance models. Note that frequent short-distance driving (one-way trips < 5 kilometres), prolonged idling in traffic, or operating in high-temperature and dusty environments will accelerate oil degradation. In such cases, it is advisable to reduce the replacement interval by 20%-30%. Additionally, due to higher operating temperatures, turbocharged models may require fully synthetic oil changes earlier, at 8,000-10,000 kilometres. For vehicles older than 5 years with engine wear, semi-synthetic oil replacement should be shortened to 6,000 kilometres. Regularly monitor the oil's condition by checking its colour, viscosity, or using test strips to prevent engine damage from deteriorated oil. Specific intervals can be referenced in the vehicle manual and should be adjusted flexibly according to actual driving habits.
