Indian Oil Corporation Limited (IOCL) is India's largest commercial oil company, established in 1959 and headquartered in New Delhi. As a government-owned Maharatna company, IOCL operates across the entire hydrocarbon value chain, including refining, pipeline transportation, marketing of petroleum products, exploration and production of crude oil and natural gas, petrochemicals, and alternative energy. With a refining capacity of 80 million metric tons per year, IOCL ranks among the top global energy firms and is listed in the Fortune Global 500.

The company operates 10 refineries and a vast network of pipelines for crude oil, petroleum products, and natural gas. IOCL markets a wide range of products, including fuels like XtraPremium petrol and XTRAMILE diesel, as well as LPG under the Indane brand and SERVO lubricants. It also engages in research and development focused on innovation in fuels and sustainable energy solutions. With a strong commitment to social initiatives and sustainable practices, IOCL plays a vital role in India's energy security and infrastructure development.