Can National VI Diesel Vehicles Use Regular Diesel?
2 Answers
National VI diesel vehicles can use regular diesel. The emissions of diesel vehicles are primarily reduced by the urea tank, with diesel quality having almost no impact. The National VI engine requires a urea solution concentration standard of 32.5%. The freezing point of urea solution at this concentration is -11°C. Below is an introduction to urea solution for vehicles: Origin: Urea solution for vehicles was first used in Europe, known as Adblue, in North America as DEF (Diesel Exhaust Fluid), and domestically as urea solution for vehicles or "vehicle denitration agent." However, it is now generally referred to as "urea solution for vehicles" in China. Function: Urea solution for vehicles is crucial for reducing pollutant emissions from diesel vehicles. It is a urea-based chemical reactant, composed of high-purity urea and deionized water, forming a 32.5% concentration solution. Applying urea solution for vehicles in the SCR system is key to achieving National IV and higher emission standards for engine exhaust.
I've been driving a China VI diesel pickup for freight transport for three years, and honestly speaking, never try to save money by using regular diesel. The after-treatment system in a China VI vehicle is as delicate as a Swiss watch. That DPF particulate filter will clog up within 400 kilometers if it encounters the high sulfur content in regular diesel. Last time, a buddy of mine didn't believe it and tried it once, ended up with a failed regeneration and the fault light came on. In the end, just cleaning the DPF cost him 6,800 yuan—the little he saved on fuel wasn't even a fraction of that. Nowadays, Sinopec's China VI diesel barrels are all marked with the CK-4 label. Spotting this before refueling is better than anything else.
