Benzotriazole (BTAH) has been known to be a very effective corrosion inhibitor for copper and its alloys. Adsorption of BTAH from oil is a relatively less researched area despite of its many applications in non-aqueous media as a corrosion inhibitor. The poor solubility of BTAH in non-polar organic solvents often necessitates usage of a solvent mixture, comprising of a polar and a non polar component, thus complicating the adsorption behaviour of BTAH. This proposal aims to probe the adsorption of BTAH at the copper/copper oxide surface to acquire compositional and structural information of these important adsorbate layers in oil.