What is the purpose of diesel exhaust fluid?

Diesel Exhaust Fluid (DEF) is a solution of urea and water that’s injected into the exhaust stream of diesel vehicles to turn NOx gases (harmful emissions) into nitrogen and water. This system is called a Selective Catalytic Reduction (SCR) implemented by vehicle manufacturers to meet EPA emissions standards in 2010.

How often do you have to put DEF in a diesel?

For example, for every 100 gallons of diesel fuel consumed, between 2 and 4 gallons of DEF will be automatically injected into the exhaust system. The typical DEF tank will be approximately 15 – 20 gallons, thus requiring a fill every 5,000 to 6,000 miles.

Is DEF fluid made from urine?

The Bottom Line on Urine and DEF Diesel exhaust fluid is not made of urine, and if you are going to urinate in your SCR system, you’re looking at having to pay some pretty hefty repair costs to clean and replace engine components once they have been contaminated.

Is diesel exhaust fluid required?

A: Because almost all diesel-powered passenger cars and trucks built since 2010 are equipped with Selective Catalytic Reduction (SCR) and require Diesel Exhaust Fluid (DEF), it is readily available at most fueling stations and automotive parts retail stores.

What happens if you don’t use def fluid?

If the truck is allowed to run out of DEF the engine’s power is reduced, a solid red warning will be displayed and the vehicle speed will be limited to 5 mph until the DEF tank is refilled.

What happens if you put diesel exhaust fluid in your diesel tank?

What Happens If I Put Diesel into a DEF Tank? Diesel is less dense than DEF, so it will float on the DEF. If it enters the SCR catalyst, significant damage can occur that may require servicing or even worse, a (costly) replacement of the catalyst.

Can you use water instead of DEF fluid?

Subject: RE: Anyone replace DEF with water? Water won’t hurt the system but it will de-rate you pretty quick. ECM compares NOx values pre/post, if conversion is low it will start throwing codes and will eventually derate.

Can you drive a diesel without DEF?

SCR Systems Modern trucks will not run without the DEF. Hence the need for diesel truck owners to check their fluid levels frequently. Reducing emissions should be everyone’s goal. Maintaining your vehicle would also reduce emissions and DEF consumption.

Can I use water instead of DEF?

If you remove the urea from the DEF — that is, if you run water through the injectors instead — it probably won’t hurt anything, since you’re reducing the level and quantity of corrosive reactants inside the stainless steel SCR system.

What happens when you run out of diesel exhaust fluid?

What is the best brand of diesel exhaust fluid?

If you want the best diesel exhaust fluid, we highly recommend the BlueDEF DEF002. This brand gives you the cleanest emissiosn and works the most effectively according to our surveys and research. It is very clean and reliable and meets all of the ISO purity and composition standards. Also, it helps increase gas mileage as a nice bonus.

How often should you use diesel exhaust fluid?

A typical diesel exhaust fuel tank on a commercial vehicle will hold between 15 and 20 gallons of DEF. Thus, you will typically require a DEF refill every 5000 to 6000 miles. Another approach to view DEF consumption, the fluid is exhausted at a 50 to 1 ratio.

Diesel Exhaust Fluid (DEF) Diesel exhaust fluid (also AdBlue) is a standardized urea solution consisting of a urea-water mixture. It is used to reduce nitrogen oxide emissions in diesel engines, which is achieved by a cathalytic reduction.

How do you use diesel exhaust fluid?

Diesel exhaust fluid can be dispensed with a hand pump or using an air- or electrically-powered pump. Small quantities of diesel exhaust fluid (DEF) are injected into the exhaust stream to mix with exhaust gases to form harmless nitrogen and water.