hamaoki, you are chasing your tail. These engines are desigined to pass oil through out the engine and expell it out either the breather (vent) or the exhaust. A classic 4 srtoke maintains oil in the crankase for many hours/ miles. What you are doing is trying to recapture/ recirculate the oil. What you are recreating is a form of limited total loss oiling system. Why reinvent the wheel? I realize it is fun to experiment but your system is complex and and defeats the simplicity of the the 4 stroke glow engine. If you can build an engine that can run 100hrs between oil changes then you have just entered the industrial engine (lawnmower) age.