(Vapor + liquid) equilibria were evaluated from the measured bubble temperatures at 95.8 kPa, over the entire composition range for the binary mixtures of iso-octane with ethanol, tert-butanol, m- and p-xylenes, n-hexane and chlorobenzene, making use of a Swietoslawski type ebulliometer. Wilson model, representing the liquid phase mole fraction versus temperature measurements well was used for the computations. (C) 2005 Elsevier Ltd. All rights reserved.