What is China National 5 Vehicle Emission Standard?

[Fonseca]

Requirements of the China National 5 Standard: The carbon monoxide emission per kilometer driven by a vehicle must not exceed 1000 milligrams; the non-methane hydrocarbon emission per kilometer driven must not exceed 68 milligrams; the nitrogen oxide emission per kilometer driven must not exceed 60 milligrams; and the PM (particulate matter) emission per kilometer driven must not exceed 4.5 milligrams. Here is additional information: 1. Changes in Sulfur Content Indicators To further enhance the capability of vehicle exhaust purification systems and reduce vehicle pollutant emissions, the sulfur content limit has been reduced from 50ppm in the fourth stage to 10ppm, an 80% reduction. 2. Changes in Manganese Content Indicators Considering the potential risks of manganese to human health and its adverse effects on vehicle emission control systems, the manganese content limit has been reduced from 8mg/L in the fourth stage to 2mg/L, with the prohibition of artificially adding manganese-containing additives. 3. Changes in Gasoline Grades Taking into account the reduction in octane number due to sulfur reduction and manganese prohibition in the fifth stage, as well as the shortage of high-octane resources in China, the gasoline grades for the fifth stage have been adjusted from 90, 93, and 97 to 89, 92, and 95, respectively. Additionally, the standard appendix includes the requirement for 98-grade gasoline.

[MorganMarie]

I just drove a China 5 compliant vehicle, which has much stricter standards than the previous China 4, mainly targeting exhaust emissions with lower limits for nitrogen oxides and particulate matter. The government introduced this to improve air quality. I bought my car in 2017 when China 5 wasn't fully implemented nationwide, but cities like Beijing had already enforced it earlier. China 5 requires vehicles to be equipped with better catalytic converters, reducing emissions by over 20%. For us drivers, it means easier passing during annual inspections and less worry about health impacts from driving on smoggy days. Plus, China 5 used cars still hold their value well now, and future upgrades to China 6 will be even more eco-friendly.

[Walker]

I think the China 5 standard mainly targets vehicle exhaust pollution and is much stricter than the old China 4 limits, such as significantly reducing carbon monoxide emissions. As an ordinary office worker, I've noticed slightly better air quality in the city since driving a China 5 compliant car, which may potentially reduce asthma issues in the long term. The policy was piloted around 2013 and implemented nationwide by 2018. Nowadays most new cars meet China 6 standards, but China 5 vehicles can still be used, though their transfer to license-restricted cities faces limitations. During maintenance, it's important to check that the catalytic converter isn't clogged, otherwise black smoke from the exhaust pipe may affect performance.

[Nunes]

The China 5 vehicle standard represents the fifth-stage emission regulations in China, which compress exhaust pollutants such as hydrocarbon limits. As an environmental volunteer in my community, I often mention that it reduces pollution by half compared to China 4. Beijing was the first to implement it in 2013, and it expanded nationwide by 2018, encouraging companies to upgrade their technologies. For individuals, maintaining a China 5-compliant vehicle requires attention to avoid using low-quality fuel, which can easily clog filtration components. These vehicles maintain stable power output and contribute to cleaner urban air in the long run.