Diesel Exhaust Fluid (DEF) Facts

What is DEF and how should I use it?

DEF is a high purity solution of urea in demineralized water (32.5%).

It is used to chemically reduce nitrogen oxides (NOx) emissions from vehicles powered by diesel engines.

DEF is contained in a separate tank and sprayed into the exhaust gases. Never fill the diesel fuel tank with DEF.

How much DEF will I need?

You will not need to replenish DEF every time you refill with diesel fuel.

The DEF consumption will be approximately 2% of your diesel fuel consumption : for every 100 gallons of diesel consumed you would need 2 gallons DEF

Why will DEF make me save on fuel?

SCR with DEF converts NOx outside the engine into harmless nitrogen and water, with the help of a catalytic converter and diesel exhaust fluid.

Competing technology EGR combats NOx inside the engine by re-circulating a portion of the exhaust back through the engine’s cylinders. This requires the engine to work harder and consume more fuel.

SCR process allows engines to operate at maximum efficiency, increasing fuel economy, and lowering costs.

OEMs and fleets utilizing SCR have seen fuel efficiencies ranging from four to eleven percent in trucks equipped with SCR technology.

Is DEF harmful?

It is non-toxic and simple to use.

If you get it on your skin or clothes, simply rinse with plenty of water.

DEF is not harmful for humans nor animals.

DEF is not explosive.

Where can I find DEF?

For further information please contact the Air1® team at: 877-810-4 DEF (333) www.air1def.com

You will find DEF pumps either at your commercial terminal or at truckstops, and they will have filling nozzles similar to those you use for diesel.

There is also an option to buy the product in 2.5 gallon bottles with a filling spout which makes it easy to pour into your DEF tank. These bottles are available from various outlets.