Chennai Petroleum Corporation Limited (CPCL) a Group company of Indian Oil Corporation (IOCL) is an Indian state-owned oil and gas corporation headquartered in Chennai, India. It was formed as a joint venture in 1965 between the Government of India (GOI), AMOCO and National Iranian Oil Company (NIOC), having a shareholding in the ratio 74%: 13%: 13% respectively.
From the grassroots stage CPCL Refinery was set up with an installed capacity of 2.5 million tonnes per annum (MMTPA) in a record time of 27 months at a cost of Rs. 430 million without any time or cost overrun.
CPCL has two refineries with a combined refining capacity of 11.5 million tonnes per annum (MMTPA). The Manali Refinery in Chennai has a capacity of 10.5 MMTPA and is one of the most complex refineries in India with fuel, lube, wax and petrochemical feedstocks production facilities. CPCL's second refinery is Nagapattnam Refinery located at Cauvery basin at Nagapattinam in Panagudi. This unit was set up in Nagapattinam with a capacity of 0.5 MMTPA in 1993 and later enhanced to 1.0 MMTPA
CPCL plays the role of a mother industry supplying feedstocks to the neighbouring industries in Manali. CPCL's products are marketed through IOCL. CPCL's products are mostly consumed domestically except naphtha, fuel oil and lubes which are partly exported.
CPCL has also made pioneering efforts in the field of energy and water conservation by setting up a wind farm and sewage reclamation and sea water desalination plants.