A Diesel Exhaust Fluid (DEF) is a non-lethal solution with 32.5% urea and 67.5% de-ionized water. The primary purpose of DEF is to decompose the nitrogen oxide (NOx) gases into nitrogen and water. NOx is a dangerous component since it emits poisonous gases. These lethal vapors are why people are now experiencing air pollution, acid rain, and a growing greenhouse effect.

DEF is inserted into the exhaust stream, and it is where the nitrogen oxide breaks into a harmless aerosol. It is stored in a separate, heated tank and is never directly added to diesel fuel.

So, why is this liquid called diesel exhaust fluid, anyway?

Simply put, the product contains two ingredients – nitrogen and salt. And just like any other type of fluid, these two ingredients are separated through a complex series of chemical reactions to form two distinct solutions:

Most diesel engines require DEF—no matter if it is an AdBlue or Blue DEF. The explanation behind this factor is either of the two kinds of DEF, and both continue to serve as an elixir that ensures what exits a diesel vehicle’s tailpipe is as sweet as an Alpine breeze.  

A diesel engine is a combustion engine where the cylinder’s air fuel’s exalted temperature ignition is caused by pressure and mechanical compression. Its factor is where it receives its name, compression-ignition engine. The creation of this type of engine is a magnificent idea and design by Rudolf Diesel. Through his production, the adaptation in the worldwide economy advanced. 

However, these engines produce too much NO2. Still, with the help of the diesel exhaust fluid, manufacturers can tune them for greater power; it diminishes power consumption and boosts the period between oil modifications. The standard DEF tank is up to 15 to 20 gallons and requires a change every 5,000 to 6,000 miles. 

To know about all the facts and avoid the myths regarding diesel exhaust fluid, Pure Diesel Power created an infographic below with all the things you need to know: