For a short run with the fuel setting on the rich side any glow model engine fuel will do. But if you want to run the engine flat out for more than a second or two then that engine needs more caster oil than is found in modern fuels.

Duke Fox recommended the use of 28% all caster oil and some nitro say 10%. for his engines that had plain bearings.

If I wanted to use that engine I would take a regular 15% model fuel and add 6 oz of Klotz caster to a gallon.