– Group IV base oil is a synthetic Poly-alpha-olefin (PAO) base oil that has been in existence for over 50 years. They are pure chemicals created in a chemical plant, in contrast to being produced by distillation and refining of crude oil.
– PAO is a type of synthetic hydrocarbon with a viscosity index ranging from 125-200. These types of synthetic base oils are produced through a process known as synthesis from chemical reactions.
– PAO-based oils are much more stable at extreme temperatures, suitable for practical use in places with very hot or very cold weather conditions. Group IV base oil is significantly more expensive than Group III base oil due to the complex production process and strict requirements involved.