Densities and viscosities of 1-bromobutane + 1-butanol, + 2-methyl-1-propanol, + 2-butanol, or + 2-methyl-2-propanol were measured at several temperatures between 288.15 K and 318.15 K. At each temperature, the experimental viscosity data were correlated by means of the McAllister biparametric equation. By using our previous thermodynamic measurements (VLE, H-E), we have tested the Wei and Rowley nonparametric model at T = 298.15 K, obtaining average absolute deviations that are comparable to those calculated for the biparametric model.