Finished oil is produced and processed from crude oil, and can be divided into six categories: petroleum fuel, petroleum solvents and chemical raw materials, lubricants, paraffin, petroleum asphalt, and petroleum coke. Among them, petroleum fuel production is the largest, accounting for about 90% of the total production; The variety of lubricants is the largest, accounting for about 5% of the production. Each country has established product standards to meet the needs of production and use.

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