The following rankings are in no particular order and are provided for your reference only.

Shell (China’s largest international oil equity producer and one of the largest traders of crude oil and its products)

Mobil (the world’s largest non-governmental oil and gas producer and Is the world's largest non-governmental natural gas seller)

Castrol (Castrol is a world-recognized lubricant expert, founded in 1899, a world-famous brand and engine oil brand)

BP ( It is one of the world's largest petroleum and petrochemical group companies, a Fortune 500 company, and an engine oil brand)

Total (one of the four largest petrochemical companies in the world, and one of the world's largest producers of liquefied natural gas) 1)

Great Wall (well-known trademark in China, Sinopec Lubricant Company, the largest professional production and marketing group of high-end lubricants in China)

Uni-President (one of the most influential brands in China, well-known in China Trademark, National Key Protected Trademark, Chinese Famous Brand)

Flowserve (Germany’s Flowserve Oil Group in 1931, the world’s largest lubricant manufacturer and engine oil brand)

Compton (brand-name product, famous trademark of Shandong Province, Qingdao Compton Petrochemical Co., Ltd., in 1992)

Kunlun (China Petroleum Lubricant Company is a direct subsidiary of China National Petroleum Corporation, engine oil)