RCIGN1 is absolutely correct about the oil content for four strokes. I have a Magnum 80 on ignition and gasoline that has about 50 hours on it with no problems on 15% synthetic oil. However, the glow engine carb setup is for metering methanol at a 6.5 air to fuel ratio. On gasoline, even with 20 to 25 % methanol, the needle settings between rich and lean are usually less than 1/4 turn. It is really sensitive. However you can take a spare needle and modify it to give you more adjustment latitude. The mod is shown in the attached drawing.