Best healthy cooking oil out of the main commercial brands?

Coconut oil.....: It's a myth that using olive oil and vegetable oils r healthy. Olive oil is good for u but not when heated, so reserve that for salad dressing. Label should say virgin and cold-pressed. Best oils/fats to use with cooking r organic butter (kerrygold) and coconut oil. Because they r saturated, they won't turn rancid with heat like other oils.

For What Purpose.: the best oil is dependent on exactly what you intend to do with it. Frying, sauté and flavoring may require different oils. I don't think that you ca say that there is a best one.