Felt it should be noted that under the current rules for obtainment of the achievement, this is no longer achievable, as you cannot speed up an injury anymore. Attempted to use fuel on a minor injury (20 fuel) just to check, no dice.
Possible solution could be to change it to using fuel to "Treat Now" an injury, or simply scrap the achievement entirely.Seems pointless to have a defunct achievement display, and may irritate completionists.