Use poulan from Walmart,,, $5.17 a gallon. That's what my Game of Logging instructor said to use and I agree. I'll pay extra for a stihl saw but I won't pay extra for bar oil. I'd like to know what makes Stihl bar oil 3 times as high? It's a gimmick, that's what. Nobody is going to sit here and tell me that it has special properties that makes the bar/chain/sproket last longer. Prove it. Everytime you buy a gallon of Poulan oil put 10bucks in a jar. When your bar wears out grab the jar full of FREE $10 bills. Make your order to Bailey's for a new bar.