What does the car prompt mean that the oil needs to be changed?

It means there is not much oil. It's time to change the oil. Insufficient oil quantity reduces the pumping capacity of the oil pump or air intake, which leads to the inability to pump the oil, resulting in a decrease in oil pressure.

There is also the improper selection of oil. If the oil is used improperly or the brand is not selected properly, the leakage will increase due to the low viscosity of the oil when the engine is running, thus reducing the oil pressure.

Extended data:

Oil storage

The storage space of barreled and canned lubricating oil is indoors to avoid being affected by climate change. Lubricating oil in keg packages and any opened packages must be stored indoors.

200L oil drums should be placed horizontally, and both sides of each row of oil drums should be fixed with wooden wedges to prevent rolling. Water has an effect on any lubricating oil. Oil drums must be checked frequently for leaks. If the oil drum must be placed upright, it is suggested to turn the oil drum upside down so that the mouth of the oil drum is facing down, or to dump the oil drum slightly to prevent rainwater from accumulating on the surface of the oil drum and infiltrating.

Too low or too high temperature may affect the quality of lubricating oil, so lubricating oil should not be stored in overheated or supercooled places for a long time.