What are the differences between China IV and China V standards?
2 Answers
The differences between China IV and China V standards lie in their sulfur content limits: China IV standard gasoline has a sulfur content limit of 10mg, while China V standard gasoline has a sulfur content limit of 50mg. The details are as follows: 1. China V: It imposes stricter controls on nitrogen oxides compared to China IV, with China V setting the emission limit at 25%. 2. China IV: The China IV emission standard is the fourth stage of China's motor vehicle pollutant emission standards. The main pollutants emitted by vehicles include HC, NOx, CO, PM, etc. Technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices are applied to reduce these emissions.
I've driven several car models and noticed that China 5 (National 5) emission standards are significantly stricter than China 4 in pollution control, with notably lower limits for nitrogen oxides and particulate matter – this directly impacts daily driving. China 4 vehicles may emit more black smoke, especially during cold starts, whereas China 5 models reduce these pollutants through optimized catalytic converters. Nowadays most new vehicles on the road meet at least China 5 standards, though some areas restrict China 4 vehicles, so checking the environmental label or VIN is essential when buying used. Maintenance costs for China 5 vehicles might be slightly higher, but their better fuel efficiency saves money long-term. Technically, China 5 standards were implemented in 2017 with greater adjustments for diesel vehicles. From an environmental perspective, I always prioritize China 5 models – the cleaner air they contribute makes my commute noticeably more pleasant.
