The binary liquid-liquid equilibrium data for the system methyl tert-amyl ether + water from (288.15 to 313.15) K and the ternary liquid-liquid equilibria for the systems methyl tert-amyl ether + C-1-C-4 alcohols (methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, and 2-butanol) + water at 298.15 K were analytically determined at atmospheric pressure by the use of stirred and thermo-regulated cells. The experimental binary and ternary liquid-liquid equilibrium data were correlated with the NRTL and UNIQUAC activity coefficient models. Bachman-Brown, Hand, and Othmer-Tobias correlations were used to ascertain the reliability of the experimental data for each system. In addition, the distribution and selectivity of C-1-C-4 alcohols as solvents were analyzed.