I want to know how to make my very own fuel for the four stroke engines. Did anyone of you here at RCU has ever attempt to do this? Is it safe? I pay roughly 15-24 a gallon!!! and I fly a lot at least two times a week sometimes three. I spent so far 130 dallors in two months straight!! I ran 5gal through my magnum .91 and it has exactly 16 hrs on it.