Diesel Exhaust Fluid (DEF)

What are the storage requirements for DEF?

DEF should be stored in a cool, dry, well-ventilated area at a constant temperature. It should be kept away from direct sunlight and an ideal storage would be inside a warehouse or garage.

Does DEF expire, or weaken in quality and performance?

DEF doesn’t really have an expiry date. When stored at room temperature, the fluid is stable for 3 years. DEF freezes at 12°F/-11°C, but frozen fluid can be thawed and used without concern of product degradation.

How much DEF is required?

The amount of DEF needed is related to the vehicle’s fuel consumption; it is about 3% of the diesel fuel consumed. For every 100 gallons of fuel consumed, 3 gallons of DEF is required. There is a DEF gauge on the vehicle’s dashboard to indicate the level of DEF in the tank.

What is API Certification for DEF?

The American Petroleum Institute (API) Certification program authorizes diesel exhaust fluid marketers that meet specified ISO performance requirements to use the API Diesel Exhaust Fluid Certification ‘logo’. The benefits of API certified Diesel Exhaust Fluid include:

  • Easily identifies diesel exhaust fluids that meet diesel engine manufacturer requirements
  • Proves the manufacturer has a very strict quality management system in place to offer DEF of the highest standard
  • Effectively helps to reduce nitrogen oxide emissions
  • Ensures testing of licensed fluids to meet program requirements
  • Assures rigorous monitoring of fluids in the marketplace
  • Provides a choice of quality brands from which to choose

How do I know that my Diesel Exhaust Fluid is high quality?

The quality of your DEF is very important and fluid that is produced, packaged and distributed by a qualified company is easily identifiable if the packaging displays the API Certified mark (symbol). All of Blue Network’s packaged Air1® DEF is API approved for quality and protection from impurities, and the product labels include the API symbol.

Why is the purity of Diesel Exhaust Fluid important?

DEF has to be of high quality and remain clean and contaminate-free in order to work properly in your vehicle. DEF that may have been exposed to dust, dirt, or mixed with other substances should not be used because the quality of your DEF product is critical for:

  • Meeting the regulated emissions standards
  • Achieving optimum fuel consumption
  • Avoiding engine damage over prolonged use of a compromised fluid

What is SCR Technology and how does it work?

Selective Catalytic Reduction (SCR) is the engine technology chosen by the majority of leading North American manufacturers of new on-road diesel medium and heavy duty vehicles for reducing nitrogen oxide emission levels, as required by the 2010 EPA emission standards. The technology requires an operating fluid (DEF) to chemically reduce nitrogen oxide (NOx) emissions during combustion. The fluid is contained in a separate tank and is sprayed into the exhaust system before the catalytic converter breaks down NOx into harmless nitrogen (N2) and water vapour to be released into the air.

What is DEF?

Diesel Exhaust Fluid (DEF) is a clear, highly pure solution of urea (32.5%) in water that meets the automotive industry specification defined by ISO 22241. It is the operating fluid used in newer diesel engines using SCR Technology. It is safe to handle and use; it is not explosive, flammable, toxic or subject to any hazardous product regulations.