Well the Arden and Atom .09s ran just fine on gas and oil. I have a synthetic oil I used in my vintage race bikes that I run at close to 100 to 1 and it would probably work fine in smaller engines like that. It's a concentrate, so that allows the higher ratios. Plane old 70wt. motorcycle oil and straight gas or white gas @ 3 to 1 will work just fine also like it always did back in the day. The biggest problem is downsizing the components required so everything fits. Don Hutchinson converted a Magnum .40, I think it was, for ignition and it ran so well, they outlawed it in OTS competition. You just have to know what you want, then know how to go about it during the process. Glow fuel is expensive now, but will moderate some as it always has after each crisis and new fangled fad comes and goes. I'll just stick with what I have and know best and always works.
Type at you later,
Dan McEntee