Not in my engine. Canola and most other vegetable oils are unsaturated. They have a natural tendency to polymerize. I am familiar with them because of the years I spent in the paint industry. There we called them drying oils, because exposed to air, they oxidized to a solid film. I think that link was posted here before. Yes there are additives which will inhibit the polymerization, but I would feel better about starting with a more stable base stock. Castor oil is a saturated oil, but has hydroxyl functionality. It is commonly chemically modified to convert it to a drying oil.