What does the China VI emission standard mean?

[McSadie]

China VI emission standard means a 50% reduction in carbon monoxide emissions, a 50% decrease in the emission limits for total hydrocarbons and non-methane hydrocarbons, and a 42% stricter limit on nitrogen oxide emissions. Below is a detailed introduction to the China VI emission standard: 1. China VIa: China VIa serves as a transitional phase between "China V" and "China VI." China VIa will be implemented for gas-powered vehicles on July 1, 2019, for urban vehicles (such as city buses, sanitation trucks, postal vehicles, etc.) on July 1, 2020, and for all vehicles on July 1, 2021. 2. China VIb: China VIb is the true "China VI" emission standard. China VIb will be implemented for gas-powered vehicles on January 1, 2021, and fully implemented for all vehicles on July 1, 2023.

[VonGemma]

China 6 is actually the national sixth-stage vehicle emission standard, which has become particularly stringent in recent years. When I bought my car, I specifically researched it—it reduces the limits for harmful substances like carbon monoxide and nitrogen oxides in exhaust emissions by nearly half compared to China 5, and also introduces new restrictions on particulate matter counts. It is divided into two phases, China 6a and China 6b, and now all new vehicles nationwide must comply with China 6b. The most critical addition is the Real Driving Emissions (RDE) test, which requires vehicles to meet standards even during actual road driving, unlike the previous lab-only testing. This poses significant technical challenges for automakers, requiring new devices like particulate filters, so China 6-compliant cars are more expensive than older models. However, in the long run, the environmental benefits are substantial.

[Briana]

You're asking about China 6 emission standards? My uncle works at the vehicle management office and talks about this every day. Simply put, it's a new regulation to strictly control vehicle emissions for the Blue Sky Project, mainly targeting PM2.5 from gasoline vehicles and black smoke from diesel vehicles. When buying new cars now, make sure they meet the China 6b standard - big cities like Shanghai stopped allowing new China 5 vehicles to be registered last year. I heard the testing methods have become more stringent too, with random checks under real road conditions instead of just relying on good lab data like before. But there are benefits for us car owners too, like using cleaner new formula gasoline which can reduce engine carbon buildup. However, owners of older vehicles should be careful as some cities may restrict China 4 and China 5 vehicles from entering urban areas.

[EllianaRose]

I learned my lesson about China 6 when changing cars! It has two phases - 6a was just transitional, while the current China 6b is arguably the world's strictest emission standard. There are three key changes: first-time particulate matter limits for gasoline vehicles, nitrogen oxide limits 30% lower than EU standards; mandatory onboard diagnostics (OBD) for real-time emission monitoring; and sulfur content in fuel reduced to 1/7th of previous levels. The biggest headache is that automakers must fit 'masks' to engines - installing GPF particulate filters, but clogged filters cause fuel consumption to skyrocket. My advice: only use Sinopec 95 octane or higher, don't cheap out with gas from small stations.