IndianOil was incorporated on June 30, 1959 under the name and style of Indian Oil Company Ltd. Upon merger with Indian Refineries Ltd. on September 1, 1964, the name of the company was changed to Indian Oil Corporation Limited.

IndianOil has its Registered Office at:
IndianOil Bhavan
G-9, Ali Yavar Jung Marg
Bandra (East)
Mumbai - 400 051, India

Guwahati Refinery, the first public sector refinery of the country, was built with Romanian collaboration and was inagurated by the first Prime Minister of India, Pandit JawaharLal Nehru, on 1st January 1962. IndianOil refineries registered a record throughput of 35.3 million tonnes during the financial year@ surpassing the previous best of 33.8 million tonnes in 2001-2002.

IndianOil commissioned India's first product pipeline, the Guwahati - Siliguri pipeline, in 1965. This 435-Km pipeline connecting Guwahati Refinery to different installations was designed to carry about 0.818 MMT of oil per year. As on 1st April 2003 IndianOil operates the country's largest network of 7170 km of crude and product pipeline with a total capacity of 52.75 million metric tonnes per annum#.

From a small begining with a sale of 0.032 million kilolitres, IndianOil achieved sales of 10 million kilolitres with a turnover of Rs. 635 crore* and profit Rs. 22.5 crore by the late 60's. From then on, the company has grown from strength to strength and presently the company sold 46.46 million tonnes of petroleum products in the domestic market during the financial year 2003@.

* Rupees One Crore = US $ 0.21 million (approx) as on 31.3.2003
# One Million Metric Tonne per annum = 20,000 bpd
@ Financial Year = 1st April 2002-31st March 2003