Straight canola oil in my Husky 372xp w/28" skip for felling and bucking redwood timber, and 24" non-skip felling and bucking tanoak firewood. 120,000bf of redwood on one bar last year with nominal wear (replaced the tip and tuned the bar is all) and used it to fell and buck 22,000 this year. 30+cords of tanoak this year and no visible wear on the 24". Also use it in the 346xp limbing saw w/20" bar.
Canola doesn't oxidize in the tank or on the bar/chain. Over the winter I empty the tank and then leave some petroleum based bar oil in just to make myself feel good.
My clothes don't smell nasty or take a stain, my lungs stay clean, the forest is happy, the saws are happy, the hippies are happy... what's not to like?