Results from drag reduction experiments with polystyrene in toluene are presented. Measurements were performed with a polymer sample with a molecular weight of 2×106at different concentrations (c). Assuming a new sublayer portion of the velocity profile of the same form as that proposed by Virk in his elastic sublayer model, it is found that the thickness of this layer is proportional toc0.76. The dependence of the onset wall shear stress on molecular weight was investigated for molecular weights of 2×106, 4.1×106, and 7.1×106. Because of degradation, the molecular weight range used was not sufficient to determine whether onset of drag reduction correlates with length or time scale.