New Delhi:The Centre on Wednesday told Parliament that concerns over engine damage or reduced fuel efficiency due to the use of E20 petrol have not been substantiated by any scientific study. Even legacy vehicles, he said, did not show any significant decline in performance or abnormal wear and tear when operated on E20 fuel. He added that the findings were backed by scientific assessments and consultations conducted before the nationwide rollout of E20 petrol. Gadkari said an Inter-Ministerial Committee constituted by NITI Aayog in December 2020 comprehensively examined issues related to vehicle compatibility and fuel efficiency. The report examined engine calibration, material compatibility, fuel systems, drivability, durability, emissions and fuel efficiency before recommending the introduction of E20 fuel.