Liquid-liquid equilibrium (LLE) data at 25 degrees C are reported for eight ternary systems consisting of methanol, alkane (heptane, octane, nonane or decane), and ether (diethyl ether or dibutyl ether). The UNIFAC group contribution method was used to predict or correlate the ternary LLE data obtained. The predicted results shows the discrepancy from the experiments. Therefore, the UNIFAC group interaction parameters were adjusted to give better correlation performance.