India’s First Oil Refinery: Digboi—Where the Oil Era Began (1901) India’s oil journey began in 1901 with the establishment of the Digboi Refinery in Digboi, Assam. Built during British rule, this historic refinery marked the birth of India’s petroleum industry. From dense jungles to industrial innovation, Digboi became Asia’s one of the earliest oil refining centers, shaping India’s energy future and economic growth. [first oil refinery in india, digboi refinery, india oil history, petroleum ind