BMW M5 mileage varies, depending on the variant. The petrol-manual variant of M5 has a mileage of 0 kmpl. The petrol-automatic variant of M5 has a mileage of 49.75 kmpl. The diesel-manual variant of BMW M5 has a mileage of 0 kmpl. The diesel-automatic variant of BMW M5 has a mileage of 0kmpl. Note that the mileage figures are as per ARAI.