A 2021 NITI Aayog report shows Automakers body SIAM had sought continued E10 availability alongside E20, warning that withdrawing lower-ethanol fuel could cause safety, efficiency, and drivability issues for older vehicles. The industry body said retrofitting existing vehicles is a big task and urged parallel E10 supply as a "protection grade" fuel during the transition.
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Automakers Warned E20 Without E10 Could Harm Existing Vehicle
