MUFAs [monounsaturated fatty acids] are found in some unhealthy refined foods, though, like canola oil, which is refined and bleached with strong chemicals and high heat. It's so processed it has to be deodorized before it can be sold. That's not an appetizing thought. And it's not good for the oils. When you expose monounsaturated or polyunsaturated fatty acids to high temperatures, they become oxidized, or damaged. When that happens, the fat can turn rancid and harmful.

What the Heck Should I Eat by Mark Hyman, MD. PP 154 -155

See also https://clinific.com/8-health-dangers-of-canola-oil-not-the-healthy-oil-youve-been-led-to-believe/

You'll find different opinions on canola oil when do to a search, and right now my internet is slow enough that I'm not going to do more searching -- I'd generally prefer to post some actual studies -- but you won't find any shortage of reasons to stay away from this oil if you look.

Most vegetable oils are highly processed from GMO, Roundup saturated crops - either corn or seeds. They are high in Omega 6 fatty acids that are funneled into the inflammation pathways. They are not heart healthy as the establishment, driven by Big Agriculture, tries to tell everyone. It is a lie. There is a difference between healthy fats and unhealthy ones - and they are not the fats the propagandists have been telling the public that they are. The average American diet is heavily tilted towards Omega 6 fatty acids that promote disease instead of healthier Omega 3 fatty acids. Omega 9, like in olive oil, is neutral. All fats are not created equal and @Narg is correct in what they post.