My Husky leaks oil. It was real bad just before the oil pump died. The pump (on my Husky) is located behind the clutch. You may want to see if you can figure out where the oil is coming from. There's not much to the system, a tank, a seal where the hose connects to the tank, the hose, and the oil pump. A leak could also suck air and reduce the amount of oil going to your chain so I would fix it.