Viscosities have been determined for the binary mixtures dimethyl carbonate (DMC) + methanol, + ethanol, + 1-propanol, + 2-propanol, + 1-butanol, + 2-butanol. and + 1-pentanol at 293.15, 298.15, 303.15 and 313.15 K and atmospheric pressure. Viscosity deviations for the binary systems were fitted to the Redlich-Kister equation. From the experimental data (DMC or diethyl carbonate with above mentioned alcohols at the same temperatures) the interaction parameters (CH3OH-OCOO) and (OH-OCOO) have been determined for their application in the UNIFAC-VISCO method, based on contribution groups, to predict the dynamic viscosities of the binary mixtures. Root-mean-square deviations are also gathered. The group contribution thermodynamic viscosity model GC-UNIMOD has been used to predict the dynamic viscosity of the binary mixtures at 298.15 K and their deviations have been shown. (C) 2003 Elsevier B.V. All rights reserved.