Volatile Organic Compounds (VOCs) having different polarities were absorbed in two viscous waste oils (a transformer oil and a lubricant, whose viscosities are equal to 19 mPa s and 79 mPa s, respectively) in a structured packing (1 m height) operated at counter-current. A synthetic hydrophobic solvent (PDMS 20, a silicone oil) and water were also used as reference solvents. Removal efficiencies of hydrophobic VOCs in silicone and transformer oils up to 80–90% were measured. Nonetheless, owing to a higher viscosity, the removal efficiencies in the lubricant were significantly lower. A deconvolution procedure, based on the Higbie penetration theory, was developed to deduce the local mass transfer coefficients (kL and kG) from KLa° values. These local coefficients were compared to the predictions of the models of Billet-Schultes (BS) and Song-Seibert-Rochelle (SSR), allowing to conclude that the SSR model better addresses the influence of the viscosity on KLa° than the BS model.