Four Things you need to know about Diesel Exhaust Fluid (DEF)
Diesel Exhaust Fluid (DEF) is an after-treatment technology that is sprayed into the exhaust system to break down the generated NOx into harmless nitrogen and water molecules. DEF is an aqueous urea solution made with 32.5% urea and 67.5% de-ionized water, and that composition can easily be thrown off. Read on to learn the 4 things you need to know about DEF.















