Researchers at IIT Kanpur report that 20% ethanol-blended petrol (E20) does not show significant harm to vehicle engines or a notable drop in fuel efficiency. The institute’s Engine Research Laboratory, led by project scientist Dhruv Raj Karana, says its study finds “no evidence” that E20 damages engines, including in existing and older vehicles. The research also indicates that any reduction in mileage is less than 5%, and Karana says the small decrease could be influenced by factors other than the fuel itself. The findings come after recent public concerns ahead of the national E20 rollout, including claims that the blend could harm engines. The Oil Ministry has previously clarified that E20 may reduce mileage by up to 5% in some vehicles, but that the impact is outweighed by benefits such as lower lifecycle carbon emissions. Times of India also cites the IIT Kanpur conclusion and notes that the petroleum ministry emphasizes E20’s advantages. Both accounts point to the availability of official guidelines for motorists as the policy moves forward.