Indian Oil Corporation Limited(IOCL), commonly known as IndianOil is an Indian state government owned oil and gas company. It is highly repute and wide popular in worldwide the possible reasons may be:

India's largest commercial oil company: It is India's largest downstream oil company, with a work force of more than 33,000 employees, a turnover of Rs. 506,428 crore and a net profit of Rs. 21,346 crore in 2017-18.

Overlap Business in Entire Hydrocarbon Value: the business of IndianOil includes refining, pipeline transportation, marketing of petroleum products, exploration and production of crude oil, natural gas and petrochemicals.

Ventured at Global Level: It has subsidiaries in Sri Lanka(Lanka IOC), in Mauritius(IndianOil(Mauritius) Ltd) and in the Middle East(IOC Middle East FZE).

Strategic location of Refineries: IndianOil has refineries at strategic locations for fueling the entire India: 1. Barauni Refinery in Bihar 2. Bongaigaon Refinery 3. CPCL, Chennai 4. Digboi Refinery 5. Guwahati Refinery, 6. Haldia Refinery, 7. Koyali Refinery, 8. Mathura Refinery, 9. Panipat Refinery, 10 Paradip Refinery

Wide Network of Pipeline: IndianOil operates a network of 14,189 km long crude oil, petroleum product and gas pipelines with a throughput capacity of 94.79 million metric tonnes per annum of oil and 9.5 million metric standard cubic meters per day of gas. Cross-country pipelines are globally recognized as the safest, cost-effective, energy-efficient and environment-friendly mode for transportation of crude oil and petroleum products.