There are two types of synthetic oils: synthetic blend oil and full synthetic oil. Synthetic engine oils are oils that contain artificially made chemical compounds, which help provide maximum lubrication properties to the engine.
Synthetic blend oil is a combination of synthetic base stocks and conventional motor oils. The addition of base stocks helps protect the engine and improve its performance. Full synthetic oils contain base stock together with various additives to improve the effectiveness of the oil. Synthetic oils vary by brand because of the amount of fluids and additives they contain, and they are the best alternative to conventional oils.