How to distinguish between National IV and National V?

[VanAaron]

National V compared to National IV main differences: 1. Improve the vehicle exhaust purification system capability, reduce vehicle pollutant emissions, and lower the sulfur content limit from 50ppm in National IV to 10ppm. 2. Due to the potential risks of manganese to human health and adverse effects on vehicle emission control systems, the manganese content limit is reduced from 8mg/L in National IV to 2mg/L, and the artificial addition of manganese-containing additives is prohibited. 3. Because of the reduction in octane number caused by sulfur reduction and manganese prohibition in National V gasoline, and the shortage of high-octane resources in China, the gasoline grades are adjusted from 90, 93, and 97 in National IV to 89, 92, and 95 in National V, while adding the requirement for 98-grade gasoline in the standard appendix. 4. To prevent the impact of low vapor pressure in winter on the cold start performance of vehicle engines, leading to incomplete combustion and increased emissions, the lower limit of winter vapor pressure is increased from 42kpa in National IV to 45kpa.