Not Wesson canola, but Wesson soy.
I have no information on the canola.
I originally picked the Wesson soy both because of common pharmaceutical use of soy oil, and secondly because the Wesson brand was the most optically pure. All other supermarket brands, at least at that time, had a very slight haze to them, indicating presence of small non-oil particles.
That isn’t to say that they must be bad, but why not go with the material that seems absolutely clear.