Well, my metabolic system will start to compensate once my fuel levels go down past a certain point. But it only works for a little while. I tend to get, um...kind of sluggish.

[ she waves a hand. ]

Anyway, I've never had any real fuel emergencies. The Cybertronians here have energon, but it's not exactly a surplus item here. Ratchet keeps some in our room so I can get to it more easily. But with all the Cybertronians on the ship, I don't think there's enough to be using it to power the engines.