This paper describes experimental work on the equilibrium spreading coefficient of one liquid on another, S, at elevated temperatures and pressures, and also an attempt to provide a universal correlation for S as a function of temperature T. The new data together with those obtained in the preceding work (Takii and Mori, J. Colloid Interface Sci. 161, 31 (1993)) cover n-octane/water at 0-150 degrees C and n-heptane/water at 0-70 degrees C. It is demonstrated that these data are correlated, with reasonable accuracy, by a single formula having the form S(T)/S-i = f[(T - T-i)I(T-c - T-i)], where T-i and T-c denote the ice point of water and the critical-point temperature of each hydrocarbon, respectively, and S-i denotes S at the ice point.