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Are you also asking the question: Is My Maruti Suzuki Wagon R E20 Compliant? If yes, then the answer to find it out is simple. The eligibility depends entirely on when your car was built. Maruti Suzuki confirmed that its full lineup would be E20-ready by 2023. By April 2023, all its models, including the Wagon R, were upgraded for the fuel. So, a Wagon R rolled out after that date is fully E20 compliant. That said, cars manufactured before April 2023, including 2021 and 2022 Wagon R units, were not originally designed for E20. These run E20 without any specific upgrade kit, since Maruti does not sell one for the hatchback. Owners may simply notice a slight drop in mileage because ethanol has lower energy density than petrol.