Crude oil and refined oil are two different types of edible oil, and there are obvious differences in the production process. Crude oil refers to the primary oil made from plant oil without refining, which usually contains more impurities and impure substances, and its color is cloudy, showing a relatively cloudy state. Refined oil is to refine crude oil through a series of processing techniques to remove impurities and impure substances, making the oil more pure, transparent and clear in color.

First of all, there are obvious differences between crude oil and refined oil in production technology. Crude oil is the original oil extracted from plant seeds or fruits by physical extraction or chemical solvent extraction, so it contains a lot of impurities and impure substances. On the other hand, refined oil is treated by a series of refining processes such as deacidification, decoloration and deodorization on the basis of crude oil to remove impurities and impure substances and make the oil more pure.
Secondly, there are some differences in nutritional components between crude oil and refined oil. Because crude oil contains more impurities and impure substances, its nutrient content is relatively low, while refined oil is richer in nutrient content and easier to be absorbed by human body.
In addition, crude oil and refined oil are also different in use. Because crude oil contains more impurities and impure substances, it is easy to produce more smoke and odor during cooking, and it is not resistant to high temperature. After refining, refined oil has high oxidation resistance and stability, and is suitable for high-temperature cooking and frying food.
Generally speaking, there are obvious differences between crude oil and refined oil in production technology, nutrient composition and use characteristics. Consumers should make reasonable choices according to actual needs when choosing to use.