What is the Difference Between Synthetic and Semi-Synthetic Engine Oil?

1 Answers
DelGabrielle
07/29/25 12:33pm
There are several differences between semi-synthetic and fully synthetic engine oils: 1. Different base oils: Semi-synthetic oil uses Group III base oil, while fully synthetic oil is a blend of Group III, IV, and V base oils. 2. Different applicable temperature ranges: Fully synthetic oil has a wider applicable temperature range. 3. Different suitable vehicle conditions: Semi-synthetic oil is suitable for economy cars, while fully synthetic oil is more suitable for higher-end models with greater demands. 4. Different costs: Fully synthetic oil has higher manufacturing costs and is more expensive. 5. Different replacement cycles: Fully synthetic oil lasts longer.
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