- Small Fuel Pack (10 fuel) costs 2 keys.
- Medium Fuel Pack (100 fuel) costs 21 keys.
- Large Fuel Pack (1000 fuel) costs 212 keys.
If the prices look like this and I have much time, I would have bought 100 small packs for cheaper fuel. I think the prices should look like this instead: 2 keys - 19 keys - 180 keys (reduced price per unit for larger packs).
Never mind, thanks, it was modified in version 5.1: