Thermodynamic properties were shown to provide a good estimation for product selectivity, thereby reducing the number of screening tests with respect to reaction temperature. Equilibrium constants for the conversion of aromatics to isoparaffins and cycloparaffins were calculated to determine reaction conditions for the production of high octane gasoline components without aromatics from hydrogenation/hydrocracking of 1-methylnaphthalene. These calculations, combined with screening studies of different catalysts, determined optimum hydrotreatment conditions.