A lockable fuel cap is provided including a closure member having a drive tooth and a removal hub. The hub includes a drive lug and moves between a lock position in which the drive lug is spaced-apart from the drive tooth and a release position in which the drive lug engages the drive tooth. An outer shell is also provided and includes an interior wall defining a guiding slot to receive the drive lug and guide movement of the removal hub between the two positions. The shell is drivingly coupled to the hub so that the member remains stationary upon rotation of the shell when the drive lug is in the lock position. The member rotates upon rotation of the shell when the drive lug is in the release position.