First its not about a saw but close. I get a call the other day from afreind that borrowed a demo saw (ts400) from his buddy. He asked what does it mean when the saw is smoking out of the exhaust whiteish blueish? I saud sounds like you mix is off as in too much oil. His response was that he yelled out to the guy running the saw "put some more gas the tank its got to much oil in it" I said you know there is a way that the gas should be mixed. I got back "i know, but a little wont kill it". alrite weel call me when you need it fixed and hang up. Today i stop down his place and there is the saw sitting there so i ask about it "i dont know it wont run know, can you fix it". Sure can but it might not be cheap. The first thing i do is check the gas and it turns out they mixed there oil not with gas but diesel. I told him i dont think it hurt anything just needed cleaned out and it just might run.