I have been working for the past 3 months as a fuel person for a well-known private jet "broker" and have a few questions regarding Prist or other additives:
It has to be pre-mixed or mixed with the fuel as it enters the tank but, what does it really do. A google search or two tells me that it is to prevent freezing or water droplets in the fuel if they exist and also, that it acts as an anti-microbial agent.
Now, it is generally optional (i.e requested by the flight crew) and other times is a requirement for operating to colder areas such as winter time in the Northeast etc...
So, the question is really: Can someone knowledgeable (which most here on this section are) explain some things about it and if there are different kinds of it? Also, some of the reason why some planes need it more than others?
And why does the cost range from, what I have been quoted here and there, anywhere from .02 to .011 cents per gallon of Jet-A added? And does 100LL need it?