On: Mexican states are moving to ban the sale of junk ...

[airstrike]

Think that comes down to the different smoke points of various oils. https://en.wikipedia.org/wiki/Template:Smoke_point_of_cookin...

You generally want to avoid smoke, so safflower oil and avocado oil are the best choices choices. But probably even better to not cook in oil at all, and just add olive oil (or your favorite source of fat) at the end