The liquid saturated properties (solubility, density, and viscosity) data for binary system of ethane + n-octadecane at three temperatures (323, 373, and 423) K and pressures up to 8 MPa were measured using a designed pressure-volume-temperature (PVT) apparatus. The experimental data (saturated liquid phase composition and density) were compared with the modeling results obtained using the Peng-Robinson and Soave-Redlich-Kwong equations of state. Both models were capable of representing the solubility data well; however, the Peng-Robinson equation of state gave better estimation of liquid saturated densities both with and without volume translation.