..Why would you want to mix your own fuel? The stuff available now is of very high quality, with the right blend of oils to keep our high $$$ powerplants running cool, and clean. All of the popular race blends have had many hours of R&D in order to perfect these ratios.
Are you a tinkerer? Am am too sometimes, but this is one area that can cost you a lot of cash if your experimental fuel has the wrong ratios.