Q: |
What is DEF? |
A: |
DEF or Diesel Exhaust Fluid
is a high purity automotive grade solution containing 32.5% urea and
67.5% de-ionized water used in the Selective Catalytic
Reduction (SCR) control systems on most new 2010 model diesel vehicles. |
Q: |
What is Urea? |
A: |
Automotive grade urea is the active
ingredient of Diesel Exhaust Fluid. Urea is
created from synthetic ammonia and carbon
dioxide.
Automotive grade urea is a non-hazardous
and nontoxic nitrogen-based compound. |
Q: |
What is DEF used for? |
A: |
Diesel engines are
required to meet stringent emissions
requirements in 2010. Many diesel engine
manufacturers have chosen a technology
called Selective Catalytic Reduction (SCR)
to meet these requirements. When added to
the exhaust gases Diesel Exhaust Fluid
reduces the NOx to the EPA required levels.
If you purchase a car, truck, tractor or any
diesel powered product with SCR technology
it will require Diesel Exhaust Fluid. |
Q: |
Is DEF added to the diesel fuel tank? |
A: |
No, DEF should not be
added to the fuel tank. Vehicles
manufactured with SCR technology are
designed with a separate urea tank to hold
Diesel Exhaust Fluid. The fluid is then sprayed
into the exhaust system. |
Q: |
What measures have been put in place to prevent diesel from
being pumped into the DEF tank? |
A: |
The standard nozzle diameter for dispensing DEF has been designed at
19mm versus the standard diesel fuel nozzle diameter, which is 22mm. In
addition, the tank cap for the DEF tank will be blue to further
differentiation from the diesel tank. |
Q: |
What happens if a non-DEF substance is accidentally entered
into the DEF tank? |
A: |
The SCR system will recognize solutions other than DEF, and the DEF
indicator light will appear notifying the driver. Depending on the level
of contamination in the tank, the vehicle may require servicing. |
Q: |
What happens if the vehicle runs out of DEF? |
A: |
Vehicles using DEF will have indicators on the dash that will alert
the driver of the DEF quantity on board. A gauge similar to a fuel
gauge will indicate the DEF level. There will be a DEF low level
warning lamp illuminated when DEF is low. If a vehicle is operated
to the degree of running out of DEF, vehicle power will be reduced
enough to encourage the operator to refill the DEF tank. Once the
tank has been refilled the engine will resume normal power levels. |
Q: |
How is the quality of DEF insured? |
A: |
A key factor to
insuring DEF quality is only purchasing American Petroleum Institute
(API) certified DEF. The API symbol on packaging guarantees the product
meets the required International Organization for Standardization ISO
22241-1 and AUS – 32 specifications. These standards will ensure the proper purity
and concentration (32.5%) of urea.
Another key factor to insuring DEF
quality is the proper handling and delivering procedures of the product.
DEF should only be purchased from companies such as
Hollon Oil Company that can provide
proof that they follow these procedures. |
Q: |
How often will refueling of DEF be required? |
A: |
The average consumption rate of
DEF is between 2-3% of the diesel fuel
consumption. For example, for every 100
gallons of diesel fuel consumed, between 2
and 3 gallons of Diesel Exhaust Fluid will
be automatically injected into the exhaust
system. A typical diesel truck should go
about 300 miles on one gallon of Diesel
Exhaust Fluid. The refueling interval will
depend on the size of tank you have. |
Q: |
How will DEF be stored and dispensed? |
A: |
DEF is stored in dedicated
containers and dispensed through dedicated
dispensing units. |
Q: |
How do I obtain DEF? |
A: |
Hollon Oil
Company can provide you with Diesel Exhaust Fluid in a variety of package and
dispensing solutions that meet your needs. |