I remember reading a list of what you can pour into the tanks of a Viper engined HS125/Dominie if you really, really need to get away (I think it was written for presidents of small African countries needing to make a quick getaway) and the list was awesome. Virtually anything that is liquid and burns.
ISTR that you could use Avgas for ?two hours? but any time after that needed a complete stripdown and overhaul.
I would not expect the same to be true of a Diesel engine, mind you.