I was looking at a table of specific heats of various oils yesterday (specific heat is the amount of heat an oil can absorb per unit mass) and noticed that Canola can carry 15% more heat per unit mass than mineral oil. Canola also has one of the highest heat capacities of vegetable oils except for Soya bean and Olive.
This means that canola should remove more heat from the bar and chain but it won't be 15% more because a good bar oil will form a thicker barrier between bar and chain than canola, and this will reduce friction and the amount of of heat generated in the first place.
Also when canola is used in the saw, probably more than 15% more canola probably comes off at the nose, but used in the aux oiler and delivered on the cutting side of the bar this doesn't matter.
This means that canola should remove more heat from the bar and chain but it won't be 15% more because a good bar oil will form a thicker barrier between bar and chain than canola, and this will reduce friction and the amount of of heat generated in the first place.
Also when canola is used in the saw, probably more than 15% more canola probably comes off at the nose, but used in the aux oiler and delivered on the cutting side of the bar this doesn't matter.