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TerraCair DEF in 1 Gallon

Was: $14.99
Sale: $10.99
Save: 27%
Save: $4.00


Diesel Exhaust Fluid (DEF) is an automotive grade of 32.5% urea mixed with 67.5% demineralized water. It’s non-hazardous, non-toxic and non-flammable. DEF is used in Selective Catalytic Reduction (SCR) systems to change diesel-powered bus, car and truck NOx emissions to nitrogen and water.

How often will I need DEF?
DEF will be used at about 2% - 3% of your diesel fuel consumption. So, every time you use 100 gallons of diesel fuel you will need approximately 2 – 3 gallons of DEF.

Is DEF a fuel additive?
No. There is a separate tank for the fluid. DEF should not be added to the fuel tank.

What are the benefits of using DEF?
Diesel engines equipped with SCR using DEF not only meet the 2010 tailpipe standard, they also deliver a significant fuel economy benefit.

Does it matter what DEF brand I purchase?
Yes, it does. TerraCair is an API-certified, ultrapure, formaldehyde-free DEF. Terra Environmental Technologies (TET) is the largest North American producer of DEF and stands ready to meet your DEF demands. With unbroken supply chain oversight managing the entire process, TET is able to provide a quality product that ensures the customer’s peace of mind. Production to pump to the vehicle tank – we stand behind our product.


Shipping Information

  • Item Requires Shipping
  • 11.0 lbs.
  • W4.0000” x H6.0000” x L10.0000”

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