A flow mixing calorimeter followed by a vibrating-tube densimeter has been used to measure excess molar enthalpies H-m(E) and excess molar volumes V-m(E) of {xC(3)H(8) + (1 -x)SF6}. Measurements over a range of mole fractions x have been made at the pressure p = 4.30 MPa at eight temperatures in the range T = 314.56 K to 373.91 K, in the liquid region at p = 3.75 MPa and T = 314.56 K, in the two phase region at p = 3.91 MPa and T = 328.18 K, and in the supercritical region at p = 5.0 MPa and T = 373.95 K. The measurements are compared with results from the Patel-Teja equation of state which reproduces the main features of the excess function curves as well as it does for similar measurements on {XCO2 + (1 - x)C2H6}, {xCO(2) + (1 - x)C2H4} and {xCO(2) + (1 - x)SF6} reported previously.