Oregon CS1500 starts instantly and doesn’t require any gas-oil mixing. Tool-less tensioning allows you to tension the chain by just tightening the ring on the side cover – no special tools required.  This chainsaw features an 18" chain that you can sharpen on the saw in 3 seconds with the pull of a lever. The automatic oiler distributes oil on the bar and chain while on the saw, keeping your chainsaw lubricated and preventing premature wear.