How often should semi-synthetic engine oil be changed?

1 Answers
KalebRose
07/30/25 9:45am
Semi-synthetic engine oil generally needs to be changed approximately every 7,500 kilometers. Below is extended knowledge about engine oil: 1. Classification: Mineral oil, semi-synthetic oil, and full synthetic oil. The classification is mainly based on the difference in base oils. Typically, mineral oil uses Group II and III base oils, semi-synthetic oil uses Group III and IV base oils, and full synthetic oil uses Group IV and V base oils. 2. Lubrication performance: Mineral oil performs the poorest, full synthetic oil performs the best, and semi-synthetic oil falls between the two. 3. Oil change intervals: Mineral oil is usually changed every 5,000 kilometers, semi-synthetic oil every 7,500 kilometers, and full synthetic oil every 10,000 kilometers. If a vehicle has been parked for more than three months, it is recommended to change the engine oil before use.
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