Is Anti-Crystallization Additive for Automotive Urea Useful?
2 Answers
Anti-crystallization additives for automotive urea are not useful. They can cause severe corrosion to vehicles. Below are the reasons why anti-crystallization additives for automotive urea are ineffective and the correct steps for using automotive urea: Automotive urea is formulated according to a specific ratio: Most automotive urea solutions do not require anti-crystallization additives. On the contrary, adding anti-crystallization additives to automotive urea can damage diesel engines. Automotive urea is prepared by mixing purified industrial urea with high-purity water at a urea concentration of 32.5%. The solubility of urea in water is highest at this concentration, and any deviation above or below this percentage increases the risk of crystallization. Regular replacement of urea: Regularly replace the urea filter, as the urea tank tends to accumulate impurities, sediments, and crystals. It is recommended to clean it periodically. Users should follow the manufacturer's suggested maintenance schedule and visit service stations for inspection and maintenance.
I've been driving long-haul trucks for over a decade, and urea crystallization is indeed a headache. I've tried several brands of anti-crystallization additives, and honestly, their effectiveness varies. When driving on southern highways in summer, they were basically useless – crystallization still occurred. It was only later that I realized the urea solution's water mixing ratio was wrong. However, during that winter trip in the north with temperatures below minus ten degrees Celsius, after adding the additive, the nozzle didn't clog, saving me the trouble of finding a repair shop halfway. The principle of these additives is actually to add antifreeze components to the urea, making it less prone to crystallization at low temperatures. If you frequently drive in cold regions or find your nozzles clogging often, spending a few dozen yuan on a bottle to try it out might be worthwhile. The key is to buy genuine products – don't skimp and use off-brands that could harm your vehicle. Also, checking the concentration meter reading before each urea refill is the most reliable practice; this habit is more effective than any additive.
