Oil, on the other hand, is defined as any neutral, non-polar chemical substance, which is a viscous liquid at ambient temperatures. It is made from plant, animal or synthetic fat. Oil is widely used for cooking, baking and frying, etc. This cooking oil is mainly produced in two separate processes. First, it is extracted from a seed, nut or a fruit. Then, it undergoes refinement to alter the appearance, texture, smell and taste.