The Difference Between Synthetic and Semi-Synthetic Engine Oil?

[Vera]

The differences between fully synthetic and semi-synthetic engine oils are as follows: 1. Different base oils: Fully synthetic oil is blended using Group III, IV, and V base oils; semi-synthetic oil uses Group III base oil. 2. Different replacement intervals: Fully synthetic oil should be replaced once a year or every 10,000 kilometers during use; semi-synthetic oil should be replaced every six months or every 7,500 kilometers. 3. Different vehicle applications: Fully synthetic oil is more commonly used in turbocharged engines and high-end luxury vehicles; semi-synthetic oil is more suitable for economical, small-displacement vehicles with smooth driving characteristics.