API SL/CF SAE 0W40 ",where: API stands for api gravity's evaluation standard for engine oil quality grade. S stands for gasoline engine oil. L stands for grade, and the lower the letters of API SA, SB, SC, SE, SF, SG, SH, SJ, SL and SM, the higher the grade of oil. C stands for diesel oil. F stands for grade, from API CA, CB, CC, CD, CE, CF, CF-4, CG-4 and CH-4, the lower the letter, the higher the grade of oil.

The top ten engine oil brands are:

1 shell (in 1907, Royal Shell Group, one of the world's top 500 enterprises, and one of the largest chemical product operators in the Netherlands) 2 Great Wall ((China well-known trademark, China famous brand, China's largest professional lubricant production and sales group, China Petrochemical Lubricant Company).

Uni-President (China well-known trademark, China famous brand, China's largest professional manufacturer of automobile lubricating oil, and national key protected trademark).

Kunlun (China well-known trademark, the earliest lubricant manufacturer in China, China Petroleum Lubricant Co., Ltd.)

5 Mobil Mobil (1882, world brand, the largest oil company in the United States, ExxonMobil (China) Investment Co., Ltd.)

6 BP (reorganized from BP/Amoco/Arco/Castrol, a global top 500 enterprise)

7 Total (1920, Total Co., Ltd., one of the top 500 companies in the world and one of the four major petrochemical companies)

8 Castrol (1899, a world-recognized lubricant expert and a famous British brand, Castrol Limited)

9 Flowserve fuchs (founded in 193 1, an independent lubricant company, the world's leading lubricant manufacturer, Flowserve Oil Group).

10 esso (the world's most famous lubricant brand, a well-known trademark in China, a brand owned by ExxonMobil).