The effect of viscosity additives from the Viscoplex series on the rheological properties of M-10G(2)k lubricants, developed from Baku base oils, was investigated with consideration of current environmental and sanitary-hygienic requirements. It was found that the system consisting of a mineral oil and viscosity additives is characterized by non-Newtonian behavior - at a shear rate of 60-80 sec(-1), the character of flow is pseudoplastic - and is distinguished by good starting properties at temperatures from +10 to -20A degrees C.