What does National IV refer to?

[JamesonMarie]

National IV refers to China 4. Below is the relevant introduction to the China 4 standard: 1. The National Fourth Stage Motor Vehicle Pollutant Emission Standard, abbreviated as the "China 4 Emission Standard" or "National IV Standard," has relatively looser emission limits for in-use vehicles compared to new vehicles under the China 4 standard. However, it is still 34% stricter than the limits of the China 3 standard. In Beijing, National IV vehicles are initially inspected every two years, and some National IV vehicles are gradually starting to undergo annual inspections. During these inspections, the vehicle's emissions must meet the published standard limits; otherwise, maintenance is required, and the vehicle must pass the inspection to be cleared. 2. The China 4 emission standard was implemented starting in 2011 and remained in effect until 2018 when the China 5 standard was introduced. The China 4 standard requires that the emission levels of various pollutants be approximately 50% lower than those of the China 3 standard.

[DelDylan]

As an enthusiast who deals with cars all day, I must talk about the 'Guo LV'—it actually refers to the China 6 emission standard. Simply put, it's a set of increasingly strict rules imposed by the government to reduce pollution from vehicle exhaust. From China 1 to the current China 6, the higher the number, the more advanced and environmentally friendly the standard. China 6 was fully implemented in 2020 and is far superior to previous generations like China 5, with restrictions such as a 50% reduction in CO emissions and the addition of a Gasoline Particulate Filter (GPF) to block fine particles—this technology is quite impressive. Many new cars, like electric vehicles and high-end fuel-powered models, already meet the China 6b standard. I think this is beneficial in the long run, saving fuel and cleaning the air, even if the initial cost is higher—it's a worthwhile investment. When choosing a car, it's best to look for the environmental label indicating China 6 compliance and avoid older models that might fail annual inspections. Daily driving habits, such as using genuine fuel and regular maintenance, can help maintain high-efficiency emission reduction. Caring about the environment is a good thing for everyone.

[LaHarper]

When I bought my car last time, I specifically researched the China VI standard and confirmed it's the China 6 emission standard. This version has been mandatory since 2020 and is much stricter than the old China 5 standard, reducing new car emissions by more than half. The key numerical identifier is clearly marked on the vehicle label. Before purchasing, I spent extra time checking the user manual or environmental compliance list to find vehicles with the China 6 label, ensuring better value retention and performance. Older models, like those produced in 2018, might still be China 5, and their resale value drops significantly. Choosing a China 6 vehicle not only saves on taxes and fees but also reduces smog emissions, making green travel feel more reassuring. Maintenance-wise, there's nothing special—just regular checks at the 4S shop for the fuel system and avoiding cheap, low-quality oil that could harm the engine. Overall, with stricter market regulations now, it's essential to be vigilant when choosing a car, benefiting both the environment and your wallet.

[AugustLynn]

China VI is the sixth version of China's vehicle emission standards. Starting from 2023, the stricter China VI-b standard has been fully implemented, requiring a more than 30% reduction in pollutants like NOx emissions from vehicle exhaust. This forces automakers to upgrade their technologies. Such upgrades help improve air quality, especially reducing smog in big cities. I personally notice the difference when driving in urban areas, and environmental awareness has grown. When choosing a car, I prioritize those with the China VI label, but maintenance shouldn't be overlooked.

[DeAlexis]

As an average car owner, I know that China VI refers to the China 6 emission standard, which most new cars comply with nowadays. The regulations implemented after 2020 have significantly reduced vehicle emissions, with much lower CO emission limits. When checking my vehicle, I look for the environmental label in the engine compartment - if it says China VI, it's compliant. For maintenance, remember not to modify the exhaust pipe randomly or use cheap fuel, as these can cause issues during annual inspections. Also, keep the sensors well-maintained to ensure proper data readings. The benefits for daily life are obvious - cleaner air and more stable fuel prices.