IIRC they changed the formula of jet a a while back, a good while back to stop people from doing what your asking. now 20 years ago or so I know a few old timers that used to do this but not any more.
just talked with one of them, seems they took out important lubricants and that causes problems. They do not recommend doing it but it can be done by either mixing it with hydrolic fluid or rex's diesel. they did not give me ratio's however.