The three types of base oils are not fully synthetic engine oils. The specific explanation is as follows:
1. Definition and Composition: Three types of base oils refer to different types of base oil products obtained through different separation, decolorization, deodorization, dewaxing and other processes during petroleum processing, while fully synthetic engine oil refers to high-performance engine oil formulated using specific chemical processes and high-quality base oils. Strictly speaking, engine oil produced from 100% PAO (poly alpha olefin) or a combination of 100% PAO and esters is fully synthetic engine oil. Engine oil made by mixing three types of base oils belongs to semi synthetic engine oil, while engine oil made by mixing the third, fourth, and fifth types of base oils is called fully synthetic engine oil.
2. Function and Function: Engine oil is composed of base oil and additives, with a large proportion of base oil determining its quality. Engine oil is mainly used as a lubricant to reduce friction and wear during the operation of mechanical components; Simultaneously serving as a coolant, it absorbs heat from the engine combustion chamber and piston top to maintain the normal temperature of the engine.
3. Replacement cycle: Due to the difference in base oil composition, the replacement cycle of fully synthetic engine oil and semi synthetic engine oil is also different. Fully synthetic engine oil needs to be replaced after one year of use or 10000 kilometers, while semi synthetic engine oil needs to be replaced after six months of use or 7500 kilometers.
The three types of base oil are not fully synthetic engine oil, but one of the main components of semi synthetic engine oil.