Jothar: It’s not Derech Bishul, it’s not on the fire, and there’s no Kli Rishon. There is no Issur of Bishul Basar B’Chalav in that case.
How is that Bittul Lechatchila? Assuming there is no taste you should say “Ein Adam Oser Es Davar She’aino Shelo”, shouldn’t you?
It’s Halachically Treif (I assume) because you have no one being Me’id that it’s Kosher. Maybe if there was strict FDA enforcement on 100% canola oil (I have no idea if there is) and rules about the way it’s processed, etc. then you could consider the packaging saying 100% canola oil as being Mesiach Lefi Tumo and it would be Kosher?