The computed average density for the 1:1 methanol-water mixture at 298 K of 0.8678 g cm -3 is within 1.6% of the value of of 0.8813 g cm -3 , interpolated from the experimental data of Mikhail and Kimel. The computed average viscosity of the 1:1 methanol-water mixture of (0.910 ± 0.019) mPa s, however, is significantly below the experimental data of 1.34 mPa s. , which is possibly a consequence of the too low viscosity of the pure OPLS/2016 methanol liquid. For the case of the 1:1 mixture, however, the deviation is even larger. However, the qualitative aspect of the viscosity of the mixture being larger than the viscosity of both their constituents is being correctly captured.