Base Oil Group V
Originating in the 1940s, any type of base oil other than mentioned in the previously defined groups. They include, among ... Read More
Base Oil Group IV
Originating in 1974, consists of synthetic oils made of Poly-alpha-olefins (PAO). Group IV base oils have a viscosity index range ... Read More
Base Oil Group III
Originating in 1993, the best grade of petroleum base oil, since they are fully produced by Hydrocracking, Hydro isomerization, and ... Read More
Base Oil Group II
Originating in 1971, a better grade of petroleum base oil, which may be partially produced by Hydrocracking. All impurities will ... Read More
Base Oil Group I
Originating in the 1930s, the least refined type which is produced by Solvent Refining. It usually consists of conventional petroleum ... Read More
