Experimental results of viscosity and density of diisopropyl ether and dibutyl ether are reported over the temperature range from (243.15 to 373.15) K. The measurements were performed at pressures from atmospheric pressure or above saturation up to the maximum pressure, which were approximately 21.7 MPa for diisopropyl ether and 21.1 MPa for dibutyl ether. The measurements were performed simultaneously using a vibrating-wire instrument operated in the forced mode of oscillation. The present results for both properties are compared with values from the literature when possible. The overall uncertainties of these results are +/- 2.0 % in viscosity and +/- 0.2 % in density. The measurements were correlated with the Tait-type equation for density and hard-sphere scheme for viscosity. For diisopropyl ether, the average absolute deviations of measurements from the correlations of viscosity and density are 0.39 % and 0.008 %, respectively. With regard to dibutyl ether, the average absolute deviations of the present results from the correlations are 0.21 % for viscosity and 0.009 % for density.