Does DEF (Diesel Exhaust Fluid) Float on Diesel Fuel?

Discover the relationship between DEF and diesel fuel, including storage and usage in diesel engines.

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No, DEF (Diesel Exhaust Fluid) does not sit on top of diesel fuel. DEF is stored in a separate tank and is injected into the exhaust stream of diesel engines to reduce emissions. It is made of a water and urea solution and is never mixed with diesel fuel itself.

FAQs & Answers

  1. What is Diesel Exhaust Fluid? Diesel Exhaust Fluid (DEF) is a non-toxic solution of urea and deionized water used to reduce harmful emissions in diesel engines.
  2. How is DEF injected into diesel engines? DEF is stored in a separate tank and injected into the exhaust stream of diesel engines, where it helps to convert harmful NOx emissions into nitrogen and water.
  3. Can DEF be mixed with diesel fuel? No, DEF should never be mixed with diesel fuel as it is used in a separate system designed for reducing emissions.

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