Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an aqueous urea solution made with 32.5% urea and 67.5% deionized water.
Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an aqueous urea solution made with 32.5% urea and 67.5% deionized water.
Source: Wikipedia "Diesel exhaust fluid" · CC BY-SA 4.0
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