I'm breaking in my new ms260 about 4 tanks now and when i clean the air filter there is always some oil on it? is this because of they set it rich for break in? they told me to take it back in after 10 tanks to re-adjust the carb. I also find it reving out pretty good for a saw that is susposed to be set rich, I pulled the the plug and it was between biege and tan does that sound about right?