Also known as:
IOCL is a majority state-owned oil refining company based in India with a large refining portfolio across India.
Barauni - 130 kbpd IOCL (100%)
Bongaigaon - 55 kbpd IOCL (100%)
Digboi - 13 kbpd IOCL (100%)
Gujarat - 275 kbpd IOCL (100%)
Guwahati - 24 kbpd IOCL (100%)
Haldia - 160 kbpd IOCL (100%)
Manali - 220 kbpd CPCL (IOCL 100%)
Mathura - 160 kbpd IOCL (100%)
Panipat - 300 kbpd IOCL (100%)
Paradip - 300 kbpd IOCL (100%)
Headquarters: 3079/3, Sadiq Nagar, J B Tito Marg, New Delhi - 110 049 India
1901 - Assam Oil Company commissioned Digboi refinery
1962 - Guwahati refinery commissioned
1964 - Commissioned Barauni refinery
1965 - Manali refinery commissioned in JV with Amoco and National Iranian Oil Company
1965 - Koyali refinery (Gujarat) commissioned
1974 - Bongaigaon refinery commissioned by the Ministry of Petroleum
1975 - Haldia refinery commissioned
1981 - IOCL took over Assam Oil
1982 - Mathura refinery commissioned
1993 - Cauvery Basin refinery commissioned
1998 - Panipat refinery commissioned
2001 - IOC assumed control of Ministry refineries
2019 - Cauvery Basin refinery decommissioned. New refinery expected to be commissioned in 2027.
2016 - Paradip refinery commissioned
2027 - Expected commissioning of new refinery on site of old Cauvery Basin refinery