How do you make the stuff? Is there a great start up cost? Do you have to be a chemist to make it? What is it made of and where do you get the materials to make it. I have heard of people using old fry oil from fast food places. Is this just a rumor? When you make a batch how do you test it? Obviously you would not want to screw it up and have to pump the stuff out of your tank. Sorry about all the questions I am just interested