100% VIRGIN BASE OIL From different origins. Group I,II,III. SN150, SN300, SN500, SN600, BRIGHTSTOCK, N100, N150, 4cst, 6cst, 8cst. Availbale in Drums,IBC & Flexi Tanks. Base Oil is the name given to lubrication grade oils initially produced from refining crude oil (mineral base oil) or through chemical synthesis (synthetic base oil).