Excess molar volumes V-m(E) at the temperature 298.15 K were obtained as a function of mole fraction x for [x(1)c-(CH2)(4)O + x(2)CH(3)(CH2)(5)CH3 + (1 - x(1) - x(2)){CH3(CH2)(5)CH2OH or CH3(CH2)(6)CH2OH}] from measurements of the density by using an Anton-Paar densimeter. Empirical equations have been fitted to the results for both ternary mixtures. The possibilities of predicting excess molar volumes of the ternary mixtures using those for the binary mixtures have been analyzed.