The temperature dependence of the kinematic viscosity for the solid heat carrier (SHC) process kukersite shale oils is described by a fundamental formula known for hydrocarbon oils. A viscosity matrix for the SHC process shale oils has been compiled. The evaluation of the kinematic viscosity of SHC process share oil binary blends is discussed. It is shown that the viscosity of SHC process "gas turbine" oil fraction -commercial fuel oil blends can be evaluated by the standard blending calculation technique. Contrary to this, when "gas turbine" oil fraction or commercial fuel oil are blended with heavy SHC process shale oils (SES A and SEF B oils), the experimental values of blend kinematic viscosity are always higher than the calculated ones. For evaluation the difference between rite experimental and calculated values of kinematic viscosity a simple equation can be used.