This feels like a dopey question. I wouldn't be asking for my car, so I don't know if I need to bother for my chainsaw, but here goes: I needed some 2 stroke engine oil for my chainsaw the other day. I went to wally-world and saw a brand for a Poulin (sp?) weed-eater. It was the correct 40:1 ratio that my Craftsman saw needs. Is this ok to use in my chainsaw?