Kia Carnival (2020-2023) mileage varies, depending on the variant. The petrol-manual variant of Carnival (2020-2023) has a mileage of 0 kmpl. The petrol-automatic variant of Carnival (2020-2023) has a mileage of 0 kmpl. The diesel-manual variant of Kia Carnival (2020-2023) has a mileage of 0 kmpl. The diesel-automatic variant of Kia Carnival (2020-2023) has a mileage of 14.11kmpl. Note that the mileage figures are as per ARAI.