*Note I'm not a nutritionist nor able to make any qualified recommendations, so keep that in mind while reading this. I'd love to hear any corrections to any of the sentences on this page.
Olive oil is great, as long as you don't cause it to smoke. The smoke symbolizes nutrients evaporating. Oxidation is also happening, which I guess is bad for you. Here is a website that has very comprehensive information on it: Olive Oil Source