What are China 5 and China 6?
2 Answers
China 5 and China 6 refer to the emission standards for vehicle exhaust. These standards regulate the content of harmful gases such as carbon monoxide, PM, and soot emitted from vehicle exhaust. The higher the number, the more environmentally friendly the vehicle's exhaust emissions. The China 5 standard reduces nitrogen oxide and particulate emissions by 25% and 80% respectively, resulting in an overall emission reduction of 10% to 15% for China 5 vehicles. The China 6 standard is an upgrade to the China 5 standard, strictly controlling pollutant emission limits. Under the exclusion of operating conditions and test influences, the carbon monoxide emissions of gasoline vehicles are reduced by 50%, the total hydrocarbon and non-methane hydrocarbon emission limits are reduced by 50%, and the nitrogen oxide emission limits are tightened by 42%.
China 5 and China 6 are different stages of national emission standards for vehicles. I usually pay attention to environmental topics, and these standards mainly restrict pollutants in vehicle exhaust. China 6 is much stricter than China 5, for example, nitrogen oxide emissions are almost halved, and some new indicators have been added. Currently, major cities in China basically require new cars to meet at least China 6b standards, and even the transfer of older China 5 vehicles is affected. I remember that China 6 was implemented in phases starting from 2019. Initially, manufacturers were criticized for the increased costs, but it does help the environment. When driving a China 6 vehicle, you need to pay attention to fuel quality, as using lower-grade gasoline can easily trigger the malfunction indicator light, which is quite annoying.
