What oils are suitable for Indian cooking (i.e. extended frying duration)?

Indian food is commonly cooked with ghee (clarified butter), for both religious and flavor reasons. Where ghee is not used, coconut or refined palm oil are common.

I can also tell you from experience that Indian food can be made with unflavored vegetable oils (canola, sunflower or soy), without a deleterious effect on flavor or texture.

Mustard seed oil is also used traditionally for Indian food.

With Olive oils, the more refined they are, the higher their burning point. So you are correct, an Organic Extra Virgin Olive Oil would be a terrible choice for Indian cooking (would cause effect on taste, smell, and nutrition) which has prolonged periods of sauteing on high heat.

Lower quality olive oils, or a light olive oil, interestingly, would be a better choice. They are much more refined like vegetable oils, so have a higher burning point. But at that point, you'd consider why are you using Olive oil?

Consider using refined butter (ghee) or coconut oil for Indian cooking. Ghee and Coconut oil will rarely smoke or burn and can stand high heat pretty well. I believe traditional Indian cooking uses ghee.

Indian cooking is mainly dependent on coconut oil or sunflower oil. Coconut oil is widely used in coastal parts of southern India. Olive oil might not give the same taste as you get in coconut oil. There are some dishes that could only be prepared using coconut oil.

Different types of oils are used for different recipes or cooking styles that vary across India. Some of them use mustard oil (Bengal and Bihar) while south indians prefer coconut oil. On the other hand, western states in India use groundnut, sunflower oil for the daily cooking needs. Olive oil is rarely used for authentic indian recipes.

Also, while some of the recipes let you pick ghee or oil, they are used for different recipes and can't always replace each other.

AFAIK, the cold pressed groundnut oil / coconut oil / sesame oil / mustard oil are healthy. Mustard oil has a strong smell and it doesn't always go well with all the recipes (it's typically used in the marination process for tandoori chicken and it's one of the ingredients that give it a red color).

It depend which region the Indian dish you are cooking is from. Kashmiris use mustard oil quite a bit which requires 'cracking' before using by boiling at high heat. I use mostly sunflower seed oil in my restaurant in Delhi, I may add in some ghee, coconut oil, or mustard oil depending on which region of India the dish you are cooking is from.

Most south Indian dishes contains groundnut, coconut,butter,ghee and gingelly or sesame oil. Which adds more taste to your food.

Its really good experience to cook and eat food cooked with sunflower oil but olive oil is also a good choice to cook. Don't use olive oil for frying, it can be used for shallow fry and to make curry where you don't needed to cook at high temperature.

sunflower oil is the best for indian cooking.

indian food tastes best in peanut oil.