The difference between fully synthetic oil and semi-synthetic oil is whether the base oil is all synthetic oil. If all base oils are synthetic oils, they are called fully synthetic oils, and if there are some mineral oils in the base oil, they are called semi-synthetic oils. Internal combustion engine oil

The base oil of fully synthetic oil can be the same type of synthetic oil, or it can be a blend of several different synthetic oils. The emergence of semi-synthetic oil is aimed at the working conditions that are difficult to meet with pure mineral oils. By adding some synthetic oils with special structures to improve their functions in some aspects, it is a way to ensure performance and minimize cost Technical solutions. The performance of semi-synthetic oil is not a simple average of the performance of synthetic and mineral oils. Selecting a reasonable semi-synthetic oil deployment scheme can sometimes achieve unexpected performance manifestations.