What are the consequences of adding a little diesel to the urea?

1 Answers
LaFinley
07/29/25 8:05pm
Adding diesel to urea has severe consequences. Diesel will gradually clog the after-treatment system along with the carbon smoke in the exhaust, and it may even combust or explode inside the exhaust pipe. How to deal with mistakenly adding diesel to urea: If the proportion added is relatively small, it won’t cause significant damage to the engine. However, if the proportion exceeds 2%, the fuel tank needs to be cleaned. If the engine has been started, the fuel lines must also be cleaned; otherwise, it can severely affect the engine. Usage of automotive urea: The usage of automotive urea is about 3-5% of the diesel consumption. The urea used in diesel vehicles consists of 32.5% high-purity urea and 67.5% deionized water. During vehicle operation, the added urea is continuously consumed. When the remaining urea level drops below around 20%, a warning will appear on the dashboard. Failure to replenish it promptly can affect the vehicle’s performance.
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