Got tired of waiting for a deal and purchased a 395XP with 36" bar and ripping chain. I have some cherry, white oak, hemlock, and elm that I plan to mill this spring. The largest width is 24-25" on the cherry and hemlock. Do I need to add an external oiler on the end of the Granberg or will the saw provide enough oil to safely mill the logs? At what bar length is an external oiler recommended? Thanks, Terry in Michigan