Chain Lube
I was going to keep this to myself for fear of my peers stomping me over it. I use vegetable oil. Canola, peanut, vegetable, corn, it doesn't matter. Never olive, though. In the 394 I make sure the flow is set to full.
I've been doing this now for two years and use 10-W-40 when I run out and need a substitute to get me through the day. Wintertime is an issue, but really only when the temp goes below 20. In a cold, cold saw it never turns 'solid' rather congeals, but run the saw for a minute and it's back to liquid state.
I do this for health reasons as I used to feel like I was breathing in a lot of atomized petrochemical particles. Also, spills were an issue, and my clothes would reek of oil at the end of each day. I don't care how much tack they put in bar oil,- some of it will still spin off.
I figured I would trade the cost of the bars and lube components for a healthier feeling about my work. So far, my bars are lasting just as long and I haven't had to replace any oilers.
Costwise, veggie oil is 5 bucks a gallon, as is bar oil. Availability, however, is much greater as it's at any grocery or party store.
ps DON'T do as the Tree Machine does. I'm just offering up what it is that I do. -TM-