What are the differences between National 5 and National 6 vehicles?

[DylanLynn]

The differences between National 5 and National 6 vehicles are: 1. Different indicator limits: The sulfur content limit for National 5 is 10ppm, and the manganese content limit is 2 milligrams per liter; the sulfur content limit for National 6 is 5ppm, and the manganese content limit is 1 milligram per liter. 2. Different emission limits: National 5 has different emission standards for diesel and gasoline vehicles; National 6 adopts a fuel-neutral principle, meaning the emission limits are the same regardless of the fuel type. 3. Different emission standards: Compared to National 4, National 5 reduces nitrogen oxide emissions by 25% for light vehicles and 43% for heavy vehicles; National 6 reduces particulate emissions by 40% compared to National 5, and for heavy-duty diesel vehicles, nitrogen oxides and particulates are reduced by 60% compared to National 5.