I mixed 16:1, thinking back that is what the old 2 stroke wackers used. I think the main difference in glow to gas lube is the oil itself. Glow fuel is thinner than gas too. Another thing I noticed, this is a 4 stroke, the the higher oil content is needed to get to the lower end, where the DLE is a 2 stroke so the fuel/oil runs through the crankcase first. I picked up Lucas Oil which is pretty good oil. The place I would get the Stihl from was closed by the time I got there, so stopped at O'Rielys instead.