What is the difference between super synthetic oil and fully synthetic oil?

1 Answers
LeTucker
07/30/25 2:45am
The differences between super synthetic oil and fully synthetic oil are: 1. Different grades. Fully synthetic oil has a wider temperature range and longer service life. For the same oil film requirements, synthetic oil can achieve this with lower viscosity, while semi-synthetic oil requires relatively higher viscosity to meet the same requirements. Semi-synthetic oil uses Group III base oil, while fully synthetic oil is a blend of Group III, IV, and V base oils. Fully synthetic oil is one grade higher than semi-synthetic oil in terms of base oil selection; 2. Different applications. Fully synthetic oil has a wide temperature range and can protect the engine with lower viscosity under the same working conditions, while semi-synthetic oil has relatively higher usage requirements. Fully synthetic oil can be used under various harsh and severe conditions, with excellent high-temperature resistance and low-temperature performance; 3. It is more commonly used in turbocharged engines and high-end luxury cars. For example, Repsol fully synthetic oil is the designated oil for the F1 Red Bull Racing Team, with high TBN additive content, which extends the oil life and cleans the engine. Semi-synthetic oil has lower TBN additive content, resulting in shorter oil maintenance intervals and the production of sulfated ash. It is more suitable for economical small-displacement models with smooth driving.
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