Bought a junk saw to disassemble for fun - was leaking bar and chain oil, so open the cover and poured it into my container of bar and chain. On looking at the oil, seemed like it was motor oil instead of bar and chain. Any issue using the bar and chain oil now that it has motor oil mixed into it? Probably a quart of bar and chain with a half tank of motor oil mixed in from the saw. I assume it's not a problem - I've heard of some folks using motor oil in their saws. Just want to be sure before I fire up the saw tomorrow. Cheers!