Kia Sonet (2020-2023) mileage varies, depending on the variant. The petrol-manual variant of Sonet (2020-2023) has a mileage of 18.40 kmpl. The petrol-automatic variant of Sonet (2020-2023) has a mileage of 18.30 kmpl. The diesel-manual variant of Kia Sonet (2020-2023) has a mileage of 24.10 kmpl. The diesel-automatic variant of Kia Sonet (2020-2023) has a mileage of 24.10kmpl. Note that the mileage figures are as per ARAI.