The relationship between crude oil and vegetable oils is as strong as ever. Vegetable oils price is influenced by crude oil price, volatile prices of crude oil put pressure on agriculture and food industry and low prices of crude oil have an impact on vegetable oils used in biodiesel production. Crude oil and vegetable oil are both natural oils, but share very different properties and uses. As a general rule, crude oil refers to oil extracted from the earth, whereas vegetable oil is classed as a food ingredient, used for cooking. Vegetable oil is an oil derived from vegetables or plants, such as corn, olive, sunflower and rapeseed. Vegetable oil consists of fatty acids, including linoleic, palmitic, oleic, etc.