So I know that the emergency engine power (F) is less efficient than regular travel, i.e. it requires more fuel per distance traveled. Turning on the headlight also requires more fuel than having it off.
However, I can't tell whether or not going at speed 1 is more fuel-efficient than speed 2. For a given distance, speed 2 means fewer supplies used and less terror accrued, but what about fuel? Does it use more fuel or the same?