Can fully synthetic engine oil be changed every 15,000 kilometers?
1 Answers
Fully synthetic engine oil should not be changed every 15,000 kilometers. The recommended replacement interval for fully synthetic oil is one year or 10,000 kilometers. Currently, engine oils on the market can be categorized into mineral oil, semi-synthetic oil, and fully synthetic oil. Among these, fully synthetic oil is the most expensive, has the widest applicable temperature range, and offers the best performance. The primary reason fully synthetic oil outperforms mineral and semi-synthetic oils lies in its superior base oil and additives. The base oil is the core indicator determining the quality and performance of an engine oil. Fully synthetic oil consists entirely of synthetic components. Synthetic oil is chemically engineered, offering significantly better performance and quality compared to mineral oil refined from petroleum. It more effectively meets engine requirements and provides superior protection. In addition to fully synthetic oil, there are semi-synthetic and mineral oils. Semi-synthetic oil is recommended for replacement every 7,500 kilometers or 8 months, while mineral oil requires maintenance every six months or 5,000 kilometers. Mineral oil is more commonly used in older vehicles. Its relatively higher viscosity makes it ideal for older engines with wear and larger gaps, as it can fully coat and effectively protect the engine.
