[Bob_Young]

I'm with Chris on this. I won't be adding it to the fuel. But, as much as I use a chainsaw, it will see the chain oiler. I've put a couple of gallons of "barely used" hydraulic oil through the saws in the past 18 months and it works fine. The saws stay a lot cleaner than when I use regular bar oil and the chains seem to hold their tension longer.

I'm a little leery of using the used crankcase oil in the good saws, but it's good enough for the clunkers and the Craftsman. They usually die of something else before the cc oil wrecks the chain oiler. In fact, I can't remember a saw that was used regularly ever losing a chain oiler even with a steady cc oil diet. Sitting unused for a year or two is what wrecks them.
Bob