Slapped a brand new chain and bar on the Stihl today. After cutting around 80 logs with the new set up this afternoon all I can say is I'm ashamed I waited so long. It literally felt like a different saw. I feel bad for the extra stress I was putting on the engine all this time. The thing is, I bought the new bar and chain in the spring, and only now am I getting around to putting it on the saw. My lesson here is, take care of the equipment, it's worth it.