The only time I have really gone through glow plugs was when I was trying to run too large of a prop on a 45 size engine. Running an engine lean will encourage heat build up and fry you r glow plug. These engines love to run really rich. I don't lean for max power with my Moki; I tune it so it is running strong with plenty of smoke coming out. In the air you should see a slight contrail, like when watching a YS140 fly. I am running standard fuel tubing with mine and have a Perry pump as well.