Resuls for the solubilization fo pure hydrocarbon oil drops indicated that the interfacial mass transfer coefficient was proportional to the first power of the surfactant concentration. These results suggested that the adsorption/fusion and desorption/emission fo micelles carrying oil molecules was the elementary molecular step within the kinetics mechanism that dictated the rates of solubilization. At low surfactant concentrations both interfacial resistance to mass transter and diffusion of micelles carrying solubilized oil significantly influenced the solubilization rate. On the other hand, at high surfactant concemtration spontaneously generated convection in the aqueous phase and rybczynski-Hadamard circulation within the drops wee observed. In such cases convection aided mass transport in the bulk phase and reduced the diffusional resistance, thus making interfacial resistance rate-controlling. For the binary mixture sstems both selective and nonselective solubilization behaviors were observed depending on the difference in carbon number of the two hydrocarbons.