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Diesel Exhaust Fluid

What is DEF?

Diesel Exhaust Fluid (DEF) is a chemical used to reduce the amount of nitrogen oxides (NOx) emitted into the air by diesel engines. DEF is a high purity chemical, comprised of 32.5% urea and 67.5% de-ionized water.

Diesel Exhaust Fluid is produced to an international standard (ISO 22241). In order to meet the 2010 EPA Diesel Emission Standards to reduce the amount of NOx emitted by diesel engines, several engine manufactures employed Selective Catalytic Reduction (SCR) as an after-treatment technology combined with Exhaust Gas Recirculation (EGR).

As explained by the American Trucking Association, “To reduce NOx, a small amount of DEF is injected directly into the exhaust upstream of a catalyst. The DEF vaporizes and decomposes to form ammonia (NH3), which in conjunction with the SCR catalyst, reacts with NOx to convert the pollutant into nitrogen (N2) and water (H2O).”

Automotive grade Diesel Exhaust Fluid must meet stringent purity standards.

The American Petroleum Institute (API), licenses manufacturers who consistently meet the quality standards set by the International Organization for Standardization. API issues a seal to those manufactures who are committed to the quality investment and processes. TerraCair® Ultrapure has been certified by the API and proudly displays the API seal.

For questions about Diesel Exhaust Fluid, please contact Jared Howell Phone: (561) 996-2787 Email: jared@howelloil.syntropycloud.com

Selective Catalytic Reduction (SCR)

SCR is an emissions control technology designed for diesel engines manufactured after the year 2010. For heavy duty and medium duty trucks, SCR provides the ability to reduce emissions to near zero levels while also delivering a 3-5% diesel fuel savings.

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TerraCair Ultrapure DEF

Howell Oil Company, Inc. has partnered with Brennttag North America to provide our customers with high quality TerraCair® Ultrapure Diesel Exhaust Fluid.

TerraCair® Ultrapure Diesel Exhaust Fluid (DEF) is a nitrogen-based urea solution that helps clean the air by reducing nitrogen oxide (NOx) emission from the exhaust stream of diesel engines. TerraCair® Ultrapure is the automotive brand name for Terra Environmental Technologies’ DEF.

TerraCair® Ultrapure is the preferred Diesel Exhaust Fluid of several leading original truck producers (also referred to as OEMs) such as Ford, Daimler, Hino, Volvo and Mack Trucks North America.

Download the TerraCair Brochure (PDF)
Download the TerraCair Materials Data Safety Sheet (PDF)

Product Packaging

Howell Oil Company, Inc. offers different packaging to meet all Diesel Exhaust Fluid usage requirements. DEF is available in 2.5 gallon jugs, 55 gallon drums, 330 Gallon IBCs (totes), and bulk or squirt fill quantities.

2.5 Gallon Bottle        

 Equipment Solutions

Howell Oil Company, Inc. has also joined forces with elite equipment manufactures to assist in offering Diesel Exhaust Fluid pumps and equipment systems which can be customized to meet your specific needs.