What does GF4 on the oil bottle mean?

GF4 on the oil bottle stands for: a general term for the specification and classification of oil.

Description of automobile engine oil type: the engine oil with the letter S is special for gasoline engines, and the quality grades of engine oil range from SA to SN*** 12, while the initial letter of diesel engine oil is "C", and the grades are CA, CB, CC, CD, CE, CF, CF-4, CG-4, CH-4, CI-4 and CJ-4 respectively.

Whether it is a gasoline vehicle or a diesel vehicle, the performance of the engine oil will be better than the previous one for every letter of the quality grade of the engine oil. It is best to choose the oil grade specified by the engine. Of course, if cars are often used in congested urban environments, it is beneficial (more environmentally friendly and economical) to use higher grade engine oil.

Extended data:

The label meaning of automobile oil is introduced as follows:

Take the label of 5W-30 as an example (the specific label can be seen on the oil drum of engine oil), where W stands for winter; The number 5 in front of W represents the viscosity of oil at low temperature. The smaller the number, the better the fluidity of oil at low temperature.

The number 30 after W represents the viscosity and high temperature shear of oil at 100 degrees Celsius. The larger the number, the more heat-resistant the oil is. When choosing oil, just follow the recommendations in the vehicle maintenance manual. There is no need to buy oil with a small number in the front and a large number in the back.

Phoenix. "Knowledge Collection" of Automobile Engine Oil

Baidu encyclopedia-engine oil label