4 tips to maximize diesel vehicle power and performance Easily Clean the Entire SCR DEF System Under certain conditions, the water in DEF can evaporate, leaving behind white crystal urea deposits.

But for North America, the advent of the clear fluid means educating drivers to the value of the system. The urea solution used in cars isn't urine. ... When a spill dries, the urea crystals remain.

Starting off with a clean DEF system, you can keep it clean with Rislone’s Diesel DEF Treatment, an additive that helps prevent white urea crystal build up, which is a byproduct of DEF injection.

Mazda becomes the first Japanese automaker to develop an urea selective catalytic reduction (SCR) system that reduces the amount of nitrous oxides (NOx) generated by diesel exhaust gases.

Problem: Crystal deposits clogging the system. DEF consists of 32.5 percent liquid urea and 67.5 percent water. Under certain conditions, the water in DEF can evaporate, leaving behind white ...

Some diesel-powered vehicles will come with a tank for the urea solution needed to reduce emissions. Here are details on diesel emissions fluid. What is it? A solution of 32.5% urea in de-ionized ...