Petrol and diesel sales in April fell by 61 per cent and 57 per cent from a year earlier, two industry sources said, though declines eased slightly later in the month when some transportation and industrial activity resumed.
Indian Oil Corp, Hindustan Petroleum Corp and Bharat Petroleum own about 90 per cent of the retail fuel outlets in the country.
The state retailers' petrol and diesel sales in first half of April declined by 61 per cent and 64 per cent, respectively, as a nation-wide lockdown to curb the spread of the coronavirus brought economic activity to a standstill.
Overall fuel sales during the month declined by 50 per cent from a year ago, according to provisional industry data provided by two sources, who asked not to be identified.
India's overall refined fuel demand includes consumption of fuel oil, bitumen and liquefied petroleum gas (LPG).
Jet fuel sales in April declined by about 92 per cent, the provisional industry data showed.