Petrol and diesel prices may go up by 50 paise to Re 1 per litre beginning April when India leapfrogs to using Euro-VI emission-compliant ultra-clean auto fuels. Currently, BS-IV grade fuel, equivalent to Euro-IV emission-compliant fuel, is being supplied in the country and the government decided to leapfrog to BS-VI grade fuel from April 2020 to cut vehicular emissions.