Vapor-liquid equilibrium data are reported for the binary systems MTBE/methanol and TAME/methanol. These data were obtained using a modified Stage-Muller equilibrium still. For the MTBE/methanol system, isobaric data at 53.33 and 101.33 kPa are given as are isothermal data at 313.15 and 333.15 K. Results at 101.33 kPa are in excellent agreement with available literature data. For the TAME/methanol system, isothermal data at 333.15 and 343.15 K are reported. A search of the literature revealed no isothermal data available for the TAME/methanol binary pair. Pure component vapor pressures were measured in the same apparatus and correlated using the Antoine equation.