wow okay, i didn't know that they are suppose to last that long, i don't think i am running it to lean. I have a steady trail of smoke coming out of the pipe but nothing like when i was breaking it in. no sputtering or anything like that so i think i got it tuned right.. but i will try a different plug. I am running 20% nitro with 14% oil. any recommendations for a plug to go along with the fuel or just in general a colder plug. Thanks a lot