Bit of a thread resurrection, but thought I'd add that gasoline, 2 cycle oil and clean bar oil all are known carcinogens. As is the exhaust from the saw. Carcinogens are everywhere. We need to be cautious about clean oil from the can as well as the stinky stuff in the drain pan. Heck, a saw that is spewing out clouds of blue smoke is way more hazardous than you can imagine as the particles are micro-fine and able to get DEEP into your lungs. A bad combination.
Also saw a post about "all the metal chips" in used motor oil... what the heck??
That stuff was just lubing my 50,000 dollar trucks diesel engine! :msp_rolleyes: There may indeed be metals in the oil, but it's measured in parts per million, not visible chunks! If you are seeing chunks of metal in your oil... you have serious issues and need a new motor.
Used motor oil smells, is dirty and stains the saw and your clothes if you get it on you. It is more hazardous to the user and the environment. But regular bar oil is also hazardous to the user and the environment! It may be less hazardous than used motor oil, but it ain't good for you or any other living thing!