The next person I see jump right from A glow to A gas engine will be the first one. I still fly with both. At the moment I'm out of big planes so I have been just flying my glow powered planes. For fuel I have always used Power Master 15% but tried several others and they have all performed very well. I even run my YS engines on the 15% and they run just fine. After A day at the field I do run my engines dry but because I fly several times A week I don't use after run oil, that and I live in A desert so there isn't A lot of moisture to worry about. Any engine that is going to sit for A while I do use the after run. NEVER in A YS engine though!!!! It destroys the pump system. You really did buy A nice engine, never had A problem with any of the OS engines.