Chennai Petroleum Corporation Limited (CPCL), one of the leading group companies of IndianOil’s, was conceived in 1960s as a 2.5 million metric tonnes per annum (MMTPA) refinery designed to produce fuels and lubes base stock. At CPCL, the past five decades have an eventful, growth-oriented phase as the CPCL family built the organisation to reach the present stature of 10.5 MMTPA capacity. Today, CPCL stands tall among the public-sector refining companies in India, with one of the most complex refineries of its kind in the country, producing an array of value-added petroleum products. It also pioneered key initiatives in several areas such as process optimisation, technology absorption, energy conservation, waste land reclamation and environment management.