Densities and viscosities for binary mixtures of diethylene glycol with 2-propanol up to 2-heptanol were measured at various temperatures and ambient pressure. From experimental data, excess molar volumes V-m(E) and viscosity deviations Delta eta were calculated and correlated by the Redlich-Kister equation to obtain the binary coefficients and the standard deviations. Excess molar volumes, V-m(E), are negative for mixtures of diethylene glycol with 2-propanol up to 2-pentanol and positive for mixture:. of 2-hexanol and 2-heptanol. The Peng-Robinson-Stryjek-Vera (PRSV) equation of state (EOS) was used to predict the densities and viscosities of the studied mixtures.