Well, it's sorta like Rocket Science. You can't simply mix ""a cup of this and a cup of that"" to get a 50/50 mixture! Mixtures of fuels, enhancer, additives, and oils must be done as a Molar Percentage. The percentage of components is a function of the requirements the mixture is supposed to fulfil. A blend must be calculated as a function of mass, and converted to something easy to use, like weight or volume. A full understanding of the difference between volume, weight, mass is really very important.