No confusion whatsoever, and the vast majority of us here agree, dealers usually know very little to nothing when it comes to saw performance. With proper tuning more oil will have little to no effect on friction. Proper tuning is the key here, as most don't even know what that is, let alone how to do it properly.
In fact more oil not only slightly raises combustion temperature, it can also allow more heat transfer "which is a good thing", but again it can raise measurable external engine temps slightly. With proper tuning you will not see a big difference in a factory saw, and certainly not one you can tell without taking an actual temp reading. In the testing Timber Wolf did many moons ago, I believe the largest difference was around 10°F If you see a drastic difference in temperature, something other than the oil is at play.
Anyway that's my input have a good one.