One promising bacterial strain (B3), biosurfactant.Alkyl acrylate-vinyl acetate copolymer was prepared using varying lengths effect of copolymer additives along with biosurfactant on the crude oil wax crystallization meth point test and viscosity index measurement for gas oil.polymeric molecule.The application of only c point of gas oil by 3 and 9 o C respectively.Furthermore, the same copolymer a...