Digboi Refiner is situated in upper Assam district of Tinsukia.

Italian engineers accidentally discovered oil at Digboi a century ago.

The Digboi oilfield boasts the oldest running oil well in the world.

Digboi had a well-developed infrastructure with British professionals working for Assam Oil Company.

The Indian Oil Corporation Ltd. took over the refinery and marketing management in 1981.

The refinery's capacity was increased through modernization and the installation of new units.

Petroleum products from Digboi Refinery are primarily supplied to northeastern India.

The refinery has achieved ISO and NABL accreditations and follows TPM.

Assam Oil Division carries out developmental activities in the region and emphasizes community involvement.

Digboi Refinery produces a range of petroleum products, including fuels, wax, bitumen, and specialty items.