I would not suggest using canola oil for op or anything period! I was getting constant headaches and congestion and awakening sick and sore and finally pin pointed it to ingesting canola oil, (not OP). In fact, OP with sesame oil was the only thing that would help with the headache. If your feeling icky and dont know why, try eliminating canola oil. This is not easy as they put it in near everything, including so called health food. But once I stopped ingesting it I felt sooo much better. Its one nasty oil, not meant for man nor beast!
Canola Oil Should not be used for Oil Pulling. Canola Oil is not a natural oil. It is a genetically modified version of Rape Seed Oil. I would not recommend using it for oil pulling or cooking. Research shows it has a tendency to leave scaring on your heart after continued use.
Also, do not use peanut oil. I was told when I first started pulling not to use it because of the mold it develops after it is picked.