Beautiful wood simonkenton7 ! I use a chainsaw just about every day for a variety of jobs I do. I also used to fall timber professionally. Back in the day all bars had grease holes in the tip and needed to be greased once a day during heavy use. The new bars have sealed bearings and cant be greased, at least Stihl bars are that way. Those grease guns BC30cal posted are also used to grease the main bearing on the sprocket on your saw. That bearing should be greased regularly as well.
