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What is diesel exhaust fluid?

Updated: 10/22/2022
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10y ago

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It is a solution of pure water and 32.5% urea. It is injected into the exhaust stream to lower emissions.

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Q: What is diesel exhaust fluid?
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What is def fluid for?

DEF (diesel exhaust fluid) is used as a consumable in SCR (selective catalytic reduction) in order to lower NOx concentration in the diesel exhaust emissions from diesel engines.


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9.08


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No.No.


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The working fluid in an internal combustion engine like a diesel would simply be the air it sucks in and passes out in the exhaust.


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What percentage of urea is contained in the acqueous urea solution known as diesel exhaust fluid?

32.5%


Does a 2007 sprinter need exhaust fluid?

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Are stock diesel exhaust systems louder than custom diesel exhaust systems?

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