I've been following this disscussion with interest. I have an OS .90 four stroke that I was planning to convert to ignition and gas but if it can be done with glo, all the better. However, I'm not sure about lubrication. One of the main reasons for going to gas is because of the gunk that methanol, or rather the castor oil, leaves on the aircraft. If gas is used and 20% methanol could two stroke oil be used at say 25:1 or would this damage the engine?