With ONGC having produced just 1.84 million tonnes of crude oil in May as compared to 1.93 million tonnes the same month, last year, the state-owned oil giant’s output in April-May dunked 4.3% to 3.62 million tonnes. This scheduled a drop in India's oil production to 5.9 million tonnes from 6.03 million tonnes in April-May, last year. However, Reliance and Nayara Energy’s over-performing refineries produced 6.8% more fuel in May.