Amen to that. A saw just came into my shop with a burned out bar, burned out clutch, and two snapped clutch springs. The saw owner was using waste cooking oil that he gets from a restaurant for free. The cafe is noted for its delicious French fries. That's also what the saw smelled like. I dumped out the oil and spent half an hour cleaning it out with solvents. What a mess!Bar oil is tacky and sticks to your bar and chain, motor oil will not. Use the proper oil and it should be fine.