Happy Birthday RJS
The power pruner, or chainsaw on a stick can be a valuable part of your tool arsenal. The first year I had my Echo PP, I hardly used it at all. Found it real tip-heavy at full extension and it trashed my low back the first couple sessions. Then one day I realized I could remove the bar oiler altogether and keep a can of WD-40 close at hand. Magnifico !
Since the lightening up of that business end, and the easier maintenence when an occasional chain flips off, I've since gone to dribbling a bit of veggie oil right on the bar and chain. Lasts 4-5 x longer than the WD-40. See, this is a tool you don't use for long periods at a time, nor do you want to cut big-diameter limbage, thus, not a lot of heat potential and lack of an auto-oiler is really no big deal.
Like Murphy4, I pretty much use if for takedowns to clear the lower limbage in a hurry. Never have climbed with it.
Enjoy. -TM-