There are generally three types of engine oil. What are they?

[OJade]

Engine oil is divided into the following three categories: conventional mineral oil, semi-synthetic oil, and full synthetic oil. Below are the relevant introductions: 1. Mineral oil: Mineral oil is a commonly used lubricant in the market. It is derived from the distillation process of petroleum, where useful substances like gasoline and aviation oil are separated, and the remaining base oil is further processed and extracted. Essentially, it utilizes the inferior components of crude oil. 2. Semi-synthetic oil: Semi-synthetic oil is made using semi-synthetic base oil, which is a product of mineral oil purified through hydrocracking technology. It is a mixture of mineral oil and full synthetic oil in a 4:6 ratio. The purity of semi-synthetic oil is very close to that of full synthetic oil, but its cost is slightly higher than mineral oil, making it an ideal transitional product from mineral oil to synthetic oil. 3. Full synthetic oil: Full synthetic oil is the highest grade of engine oil. It is derived from ethylene and propylene dispersed from natural gas or gas in crude oil, which then undergoes complex chemical reactions like polymerization and catalysis to form a lubricating fluid composed of large molecules.