Hyundai Grand i10 Nios (2019-2023) mileage varies, depending on the variant. The petrol-manual variant has a mileage of 21.00 km/l. The petrol-automatic model has a mileage of 21.00 km/l. The diesel-manual variant has a mileage of 26.20 km/l. The diesel-automatic model has a mileage of 25.00km/l. The cng-manual variant has a mileage of 18.90km/kg. Note that the mileage figures are as per ARAI.