I used to work nights for a ER vet so I stayed up all night a lot. The last time I remember staying up w/o any sleep at all is a few years ago when I had to take DH to the people ER for a migraine. We were there for 14 hours and I still had to go to work. I wound up being awake for 42 hours.
When's the last time you put a full tank of gas in your car?