In a written reply to the Lok Sabha, Gadkari argued that E20 fuel can better the acceleration of a vehicle and improve the ride quality. In addition to this, E20 fuel's carbon emissions are 30 per cent lower than compared to the E10 fuel. "The fuel efficiency of vehicles may be reduced by 2 to 6 per cent depending on the vehicle category and vintage. The row over E20 petrolThe rollout of E20 petrol (80 per cent petrol, 20 per cent ethanol) has drawn criticism from opposition parties and some consumer groups, who have raised concerns about its impact on older vehicles not specifically designed for 20 per cent ethanol blends. (With inputs from PTI)ALSO READ:Why India is mixing ethanol with petrol and what it means for consumers?