The densities of (benzene + isopropylbenzene, or 1,2,4-trimethylbenzene, or 1,3,5-trimethylbenzene) were measured at temperatures (298.15, 308.15, 318.15, and 328.15) K by means of a vibrating-tube densimeter. The excess molar volumes V-m(E) m calculated from the density data provide the temperature dependence of V-m(E) in the temperature range of (298 to 328) K. The V-m(E) results were correlated using the fourth-order Redlich-Kister equation, with the maximum likelihood principle being applied for the determination of the adjustable parameters. It was found that the deviations from ideal behaviour in the systems studied (all being positive) decrease with increasing temperature. (C) 2003 Elsevier Science Ltd. All rights reserved.