Ralph, Antique

There is no good way to determine a glow fuel/gasoline mix. It is totally dependent on the type of oil used in the glow fuel. Unless the oil is soluble in both methanol and gasoline, you are limited by the solubility of methanol in gasoline which is somewhere around 1%. Even though a lot of glow fuels use synthetic oils, all are not soluble in gasoline. The best suggestion I have is to take a fixed quantity of gasoline and add about 25% glow fuel. If the mix seperates you have the choice of adding an oil which is soluble in both, acetone ( which will soften any rubber based diaphragms), di-ethyl ether, nitropropane or propylene oxide to form a tertiary system.
I have mixed gasoline/Omega 10% in a 70/30 ratio and then added Klotz until there were no immisible layer. This was OK since I was using it in a bushed glow engine which needed high oil.

Thte problem of making this fuel with low oil for gasoline engines is that another suitable material has to be found which will establish the tertiary system and complete solubility.

I'd like to elobrate on a point that tkg made about nitromethane and gasoline. Nitromethane, when mixed with gasoline will form unstable, shock sensitive compounds. At any concentration of nitromethane in gasoline above about 30% you are flirting with a dangerous situation. If however you insist on using nitromethane, always pour the nitromethane into the gasoline and never pour the gasoline into the nitro. If you pour gasoline into nitromethane, then the nitromethane concentration in the mixing zone can abe as high as 90% at the interface between the two. The higher the concentration of nitromethane the more unstable are the compounds which are formed.

If you are going to use gasoline in a fuel mix and want an additive to boost the oxygen content then stay with materials like propylene oxide, di-ethyl ether or nitropropane.