What do China 5 and China 6 mean?

[HeidiFitz]

China 5 and China 6 are vehicle emission standards. Here are the specific details about vehicle emission standards: 1. Emission gas regulations: They specify the content of harmful gases such as carbon monoxide, PM, and soot emitted from vehicle exhaust. 2. Meaning of the numbers: The higher the number, the more environmentally friendly the vehicle's exhaust is. Below is extended information on the differences between China 5 and China 6: 1. Standard level: The China 6 standard is an upgrade of the China 5 standard and will become one of the strictest standards globally. 2. Pollutants: Compared to China 5, China 6 strictly controls the emission limits of pollutants. Under the exclusion of operating conditions and test influences, the carbon monoxide emissions of gasoline vehicles are reduced by 50%, the emission limits of total hydrocarbons and non-methane hydrocarbons are decreased by 50%, and the nitrogen oxide emission limits are tightened by 42%.

[OVictoria]

When I first bought a car, I researched China 5 and China 6 emission standards. They are China's automotive emission standards, with higher numbers indicating stricter requirements. China 5 is the fifth stage, implemented since 2017, with relatively lenient limits. China 6 is the sixth stage, rolled out in two phases (6a and 6b) after 2020, with much tighter limits and stricter controls on pollutants like nitrogen oxides and particulate matter. Choosing a China 6-compliant car has many benefits: for example, driving in big cities, a China 6 car can avoid traffic restrictions, is more environmentally friendly, fuel-efficient, and has higher resale value in the long run. However, be cautious: China 6b is the latest standard, fully implemented from 2023 onwards. When buying a car, check the emission label on the model to confirm compliance, as buying the wrong one could affect registration. Overall, upgrading standards promotes cleaner technology, which is good for air quality, but China 5 used car prices may drop faster, requiring a balance between budget and environmental concerns. I chose China 6 to worry less about the future.

[CollinRose]

With years of auto repair experience, I've encountered numerous emission issues. China 5 and China 6 refer to emission standard tiers. China 5 is older with looser controls, making exhaust more prone to exceed limits; China 6's stricter regulations include transitional 6a and ultimate 6b phases, cutting nitrogen oxide limits by over half while complicating catalytic converter system designs. Retrofitting China 5 vehicles to China 6 standards proves extremely difficult during repairs, requiring costly part replacements. Though China 6 vehicles have higher maintenance costs, they experience fewer failures and better environmental performance, depressing China 5 models' resale value. Use diagnostic tools to check emissions data - illuminated warning lights often indicate sensor or filter issues. The policy promoting China 6 standards since 2019 helps reduce urban smog. For hassle-free repairs, prioritize China 6 vehicles. Understanding this aids maintenance decision-making.

[HopeLynn]

I value environmental issues, and China 5 and China 6 represent the upgrade of emission standards. China 5 was implemented in 2017, while China 6 was introduced in phases after 2020, with stricter pollution limits and tighter control over harmful substances as the standards progressed. For example, China 6 significantly reduces particulate emissions, improving air quality and protecting health. As an ordinary citizen, supporting higher standards can help reduce air pollution and prevent smog. Choosing a China 6-compliant car when purchasing a vehicle is a contribution to green actions, pushing automakers to innovate cleaner technologies. The higher the number, the stricter the standard, with China 6b being the most stringent currently. Small daily driving actions can collectively lead to significant changes.