One pet theory that I've been harbouring for a while is that the different obesity rates in the US and Canada could be party explained by the dominance of canola vs soy/corn oil in various prepared products. Many brands of mayonnaise or potato chips will use canola oil in the Canadian version and soybean oil in the US version. A sensitive palate can taste the difference in the same way that Mexican coke made with cane sugar is distinguishable from the US HFCS version.
Contrary to what many people think canola's omega-3 to omega-6 ratio is actually not too bad, while soy and corn are off the charts in terms of omega-6 dominance.
EDIT: to answer your question on cooking or baking, coconut and avocado are great, mostly monounsaturated, and have high smoke points. As does pure olive oil (the yellow stuff, not the green EVOO, which is preferred for salad dressings or lower heat cooking). There was a recent study, done at UC Davis, that found a lot of avocado oil to be fraudulent.[0]. Otherwise for frying, beef tallow is still the best, and ghee can also be used for sautéing since it has a much higher smoke point than unrefined butter.
[0] https://www.ucdavis.edu/food/news/study-finds-82-percent-avo...
> Only two brands produced samples that were pure and nonoxidized. Those were Chosen Foods and Marianne’s Avocado Oil, both refined avocado oils made in Mexico. Among the virgin grades, CalPure produced in California was pure and fresher than the other samples in the same grade.