im stationed in korea right now and im not sure of the fuel quality. right now my savage21 continues to overheat no matter what i do. the fuel is power master 20% nitro with 15 or 20% all synthetic oil. my main concern is the age of the fuel. or should i lower the nitro content to 15% with 20% all synthetic oil. also how rich should i make it? should it blow out smoke? please help before i blow it up! [sm=confused.gif]