This work continues our studies about the excess thermodynamic properties for ternary mixtures containing esters, 1-alkanols, and alkanes. We present excess volume and excess enthalpy data for the ternary system (butyl butyrate + 1-octanol + dodecane) at the temperature 308.15 K and atmospheric pressure. Excess molar enthalpy measurements were made using a Calvet microcalorimeter. The accuracy in the excess enthalpy measurements was estimated to be better than 1%. Excess molar volumes were determined from the densities of pure liquids and their corresponding mixtures using an Anton Paar digital densimeter with a resolution of +/-2 x 10(-6) g.cm(-3). The binary experimental data were fitted using a Redlich-Kister variable-degree polynomial equation. The ternary system results were correlated using the Cibulka equation. Experimental values were compared with the predictions obtained by several group contribution models. The prediction of some empirical equation was also tested. These equations offer reliable estimations of excess properties for a multicomponent mixture using the experimental data of the binary systems. There are the symmetric equations introduced by Kohler; Jacob and Fitzner; and Colinet and the asymmetric ones due to Tsao and Smith; Toop; Scatchard et al.; and Hillert.