No problem, I'm pretty sure it's 0 for using used motor oil and 27 against. Now gosh dang, I know there are people are there who do it. Come on, speak up, your vote counts too.
Or maybe that sort don't hang around here.
Well, OK, this old phart will admit that a few years ago when I moved to this ranch and got back into chainsaws, I dragged my old Mac habits with me. I used NEW non detergent 30 WT motor oil on the bars. Never used stuff. The metal and blowby carbon in used motor oil is "no bueno" for doing anything with except taking to the recycle bin at the local dump.
However, I soon flipped to real, genuine, non-immitation chainsaw bar oil after finding a gallon for a buck at a garage sale someplace. Lo and behold, it sticks to the bar better and the chains do not stretch as fast using it, and it stays on the chain and bar longer. Doi! Like the Gas man up in the islands in Washington just north of me says, "why use anything else?" So now I use Husky, Pro Power, Poulon, Stihl, or the bar oil that they make in Portland and sell at Bi-Mart. Just about any sticky tacky goo in the gallon bottle that is on sale. I would flip to bio-degradable bar oil if I could find it for less than $18 a gallon. 'Spensive stuff. I also save the calola oil for cooking french fries in. Veg oil will resin up, is too thin, and can go rancid on you.
For that matter, I use premium gas in my saws now. More even burn with higher octane. I also use premium Stihl, Castrol and/or better air-cooled rated blue goo to mix with the gas. Works better, and the saw plugs are a nice tan color with no build-up. The 460 that I just bought/tested/returned had a wet and black fouled plug in it... looked like they ran outboard motor oil in there and ran it way too rich. Piston and cylinder were also scored... and the whole saw felt like it was dipped in oil residue. Maybe from running too rich? :rockn: