Question: 1 km use how many petrol?
Answer: 8.2 km/liter becomes 12.19 l/100km and 12.3 km/liter becomes 8.13 l/100 km. In the US mpg, you get numbers between 10 and 100 and bigger is better; more miles per fuel unit. In the European l/100km, you get numbers around between 2.5 and 25 and a lower number is better, fewer fuel units per distance.