Blue Sky DEF

A joint effort between Prime Lube and Brewer-Hendley to provide the Southeastern US with diesel exhaust fluid. More info at

What is DEF?

Diesel Exhaust Fluid (DEF) is an ultra-pure urea solution that acts as a reductant. It is carried in a separate tank, and is then injected into the hot exhaust stream and absorbed onto a catalyst. It is of 32.5% high-purity urea and 67.5% deionized water. The purpose of DEF is to reduce Nox concentration in the exhaust emissions produced by diesel engines. The process by with the NOx emissions are reduced is called Selective Catalytic Reduction (SCR).

DEF is an aqueous urea solution whose specifications are regulated by standard ISO 22241 70070. It is a non-toxic, nonflammable, non-hazardous and non-explosive substance.

Blue Sky Diesel Exhaust Fluid (DEF)


Why is DEF important?

The Environmental Protection Agency released emissions rules in 2010 for diesel vehicles of all sizes. These rules are some of the most stringent emissions standards in the world. Most light-duty and heavy-duty trucks are not able to meet the requirements without using SCR.

Fleet experience with heavy duty trucks model year 2010 and newer suggest 5% fuel savings compared to 2007 model year vehicles with similar engines.

How can DEF help my fleet?

DEF not only decreases the NOx emissions, but also provides significant fuel savings. Fleet experience with heavy duty trucks model year 2010 and newer suggest 5% fuel savings compared to 2007 model year vehicles with similar engines. Fill out the form below to see how much you could save with DEF.

Selective Catalytic Reduction

What is SCR?

Selective Catalytic Reduction (SCR) is an emission control technology designed to inject Diesel Exhaust Fluid (DEF) into the exhaust stream that will convert nitrogen oxides (NOx), with an aid of a catalyst, into nitrogen (N2) and water (H2O). It is the after-treatment technology that treats exhaust gas downstream of the engine.

SCR is a system that uses DEF to reduce NO to near zero levels to meet the Environmental Protection Agency (EPA) 2010 emission regulations.

SCR Process

Diesel engine recycles the exhaust. NO and Particulate Matter travel to DPF
Diesel Particulate Filter (DPF) traps the particulate matter and burns off the matter with a low grade heat. Note: The filters do need frequent maintenance. DEF is sprayed into the exhaust stream as the NO travels down to the SCR Catalyst.
DEF and NO enter the SCR Catalyst together where they react and are converted to nitrogen and water vapor.
Nitrogen and water vapor are then released from the tailpipe.

2.5-Gallon Jug

2.5 gallon easy pour container
Attachable flex spout
Available 48 bottles per pallet
DOT approved

55-Gallon Drum

Available 4 drums per pallet
Easy dispensing of DEF with Poly or Stainless steel hand pump
Easy dispensing of DEF with electric pump, hose and filling pistol (valve)

275-Gallon IBC Totes

Available in 275 gallons.
IBC containers are stackable to 3 high.
IBC is available with either an “open” or “closed” system.
Container is sealed – access caps secured with nylon plastics to expose any possible tampering of product.
Easy assembly of Pump, Hose and Filling-pistol (valve).

Bulk Deliveries

DEF Available for Bulk Deliveries
Short Truck or Tanker Load deliveries available