Well my NTC3 showed up Thurday. As long as the weather stays decent this weekend I am going to be doing the breakin this Saturday. I just went the LHS and picked up a fresh gallon of 20% O'Donnell fuel. I have under a half a gallon of fuel from last summer but I left it on the floor in my room which is in the basement. (This was my first winter since I got into nitro and didn't know any better until now) It was on the carpet but there is no padding underneath the carpet so I am going to say the fuel is questionable. I also left fuel in the pit bottle. I am going to dump the fuel in the pit bottle but I am not sure how to go about cleaning it out so when I pour the fresh stuff in there that it won't mix before I start breaking the engine in. Should I be worried abou this?