Which gasoline is better for PetroChina or Sinopec to extend Shell?

In the traditional sense, the three giants of gasoline production in China have always been called "three barrels of oil": PetroChina, Sinopec and CNOOC (in order of oil production scale).

For a long time, "three barrels of oil" represents the national standard demonstration standard of oil products. As for the so-called "Sinopec crude oil is imported, so the oil product is higher than PetroChina", it is also completely misinformed. Because the crude oil that China mainly imports from the Middle East is actually a low-grade high-sulfur crude oil, not a high-grade crude oil.

Especially after entering the fifth stage from the fuel environmental protection level, in fact, the finished gasoline of "three barrels of oil" is very close. As for Shell Oil, which is a joint venture in China, Shell cooperates with Yanchang Oil to contribute capital. Therefore, it is not comparable to foreign Shell oil products. The oil of Shell gas station in China is almost the same as "three barrels of oil".

The only principle is: which gas station is close to the unit or home, or which gas station has strong preferential treatment and cheap price.