What are the differences between National III and National IV diesel vehicles?

[FelixRose]

There are mainly the following differences between National III diesel and National IV diesel: 1. Sulfur content: The sulfur content of National IV diesel is significantly lower compared to National III diesel. National III diesel contains much higher sulfur content than National IV. 2. Diesel stability: National IV diesel has good oxidation stability, is less prone to discoloration and deterioration, and is less likely to form sediments and gums. 3. Benzene and hydrocarbon content: The benzene and hydrocarbon content in National IV diesel is greatly reduced, while National III diesel has relatively higher benzene and hydrocarbon content. 4. Diesel quality: National IV diesel has seen a significant improvement in quality compared to National III. Overall, National IV diesel is a new standard diesel that emerged in accordance with the National IV emission standards. The introduction of National IV diesel represents an improvement in diesel quality, with greater emphasis on environmental protection requirements compared to National III. Whether in terms of emission quality or diesel quality, National IV outperforms National III, better reflecting the country's requirements for low-emission environmental protection.