What is the difference between National IV and National V?

[ChaseFitz]

The differences between National IV and National V are: 1. Different upper limits of sulfur content in gasoline: National IV stipulates that the upper limit of sulfur content in gasoline is 50 milligrams per kilogram; National V stipulates that the upper limit of sulfur content in gasoline is 10 milligrams per kilogram. 2. Different nitrogen oxide emission standards: National IV nitrogen oxide emission standard is 0.08 milligrams per cubic meter; National V nitrogen oxide emission standard is 0.06 milligrams per cubic meter. The methods to distinguish between National IV and National V are: 1. Check the vehicle fuel consumption label; 2. Check the vehicle nameplate; 3. Check the environmental inspection compliance mark. National IV and National V refer to different stages of emission standards stipulated by the state. The higher the number of the emission standard, the higher the level, and the higher the level, the lower the engine emissions will be.