Well the Enya gas engine is a bit of a mystery in that it uses a glow plug, but you have to use their special Enya oil mix with the gasoline. They sell a special Enya oil mix to mix with the gasoline for their gas engine. So I don't know if anyone tried to use anything else with the engines or not. They only sell them in Japan for their local market. So unless someone flew over to Japan and bought the engine and oil to bring back, we won't know much about it. I guess you would have to go by boat as the air lines will very likely refuse to let you carry the oil in your luggage onto the plane.

The use of the OS P3 Turbo plug in a gasoline engine is a a interesting idea. No one has done it yet. But it wouldn't be too difficult to make up a spark plug to turbo plug adapter to give it a try. Now there are some extra hot regular glow plugs that might work too. But it is hard to say. I don't know how hot of a heat range the OS P3 plug is in comparison to other glow plugs.