How Often Should Semi-Synthetic Engine Oil Be Changed?

1 Answers
Beckett
07/25/25 9:40am
Semi-synthetic engine oil is generally replaced every 7,500 kilometers. Below is extended knowledge about engine oil: 1. Classification: Mineral oil, semi-synthetic engine oil, and full synthetic engine oil. The classification is mainly based on the differences in base oils. Typically, mineral oil uses Group II and III base oils, semi-synthetic engine oil uses Group III and IV base oils, and full synthetic engine oil uses Group IV and V base oils. 2. Lubrication performance: Mineral oil has the poorest performance, full synthetic engine oil has the best performance, and semi-synthetic engine oil falls between the two. 3. Oil change intervals: Mineral oil is usually changed every 5,000 kilometers, semi-synthetic engine oil every 7,500 kilometers, and full synthetic engine oil every 10,000 kilometers. If a vehicle is left unused for more than three months, it is recommended to change the engine oil before using it again.
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