Oils are used in cooking various foods and pastry. Oils are usually liquid at room temperature. Of course, vegetable and animal oils are exceptions in this case, and they are still solid at room temperature.
Vegetable oil are produced from many seeds, each of which has different characteristics and nutritional properties. Also they have different specific temperature that should be given enough attention in cooking or frying.
Crude oil and refined oil are two items imported to Iran from Brazil, Argentina, Ukraine and Russia.