Virgin Base Oil
Group I Base Oils: which are also known as conventional oils, with the majority of hydraulic and bearing lubricants being made using an API Group I stock. Group I main advantage is their high solvency, this means that they have a high tolerance to degradation by-products, which allows for the life of a lubricant to be extended.
Group II Base Oils: which have a high level of purity and are found in all modern conventional petroleum oils. Over the years due to API services requirements becoming stricter, the quality of these oils has steadily improved. Due to the higher level of purity this base stock gives lubricants a longer service life.