What is AdBlue?
AdBlue (a registered trademark of the VDA)
is a vehicle operating fluid for new engine
technology. It is based on a high purity urea
solution, therefore it is not a fuel, nor is it
mixed with fuel. If you have a machine that
requires AdBlue you will need to dispense
this product into a separate tank which will
be located on the vehicle, identified by its
Why do I need AdBlue?
Over the past 15 years exhaust emission
limits have been lowered to help reduce
the amount of harmful toxic gas (including
NOx) that is released into the atmosphere.
Farm machinery manufacturers have had
to re-develop their engines to comply with
EU legislation Tier IIIb and Tier IV. A new
technology called SCR (Selective Catalytic
Reduction) is a proven system at reducing
NOx emissions from exhaust gases.
How does it work?
SCR is now fitted to most new drivable
machinery coming off the production line
and it requires a re-agent known as AdBlue
to be sprayed into the exhaust system.
AdBlue is used to create a chemical reaction
in the catalyst so that NOx gases are
converted to harmless steam and nitrogen,
which are emitted from the exhaust pipe.
How do I know if I need AdBlue?
Your local AGCO dealer will advise you
about your new machine and whether
it needs AdBlue at the time of purchase.
Your dealer can also provide you with the
AdBlue itself and any associated
The next vehicle you drive may need
AdBlue so familiarise yourself with what to
look out for:
• A plastic AdBlue tank, smaller than the
fuel tank, will be fitted on the body of
the vehicle, it will have a blue cap for
• There will be an AdBlue digital display
located in the cab indicating the level of
AdBlue in the tank.
• Tank caps and digital displays may differ
in look and position dependant on the
Do not operate your vehicle without
AdBlue in the tank; doing so will cause
damage to the catalytic converter, filters
and nozzles. A vehicle operating without
AdBlue may enter crawler-mode and will
be operating illegally.
Frequently Asked Questions
What is AdBlue and how should I use it?
AdBlue is a vehicle operating fluid used to reduce emissions, it is a high purity urea solution and is not a fuel additive, nor does it touch the fuel system. It is a mix of demineralised water (67.5%) and urea (32.5%) to a specific DIN specification. AdBlue is contained in a separate tank on the machine’s chassis. It is sprayed into the exhaust gases via the SCR system which is installed when the vehicle is being built. Refill the AdBlue tank when the display indicates that the tank is nearing empty.
Do not operate the machine without AdBlue in the tank. Never fill the diesel tank with AdBlue or vice-versa. Do not dilute the AdBlue.
How much AdBlue will I need?
You will not need to replenish your AdBlue tank every time you refill with diesel. Typical AdBlue to fuel usage is between
4% – 6%, this will differ depending on machine-type, type of work undertaken and miles per gallon.
Will it cost me more to run my machine?
AdBlue will reduce your diesel consumption, making it more cost-effective to run your machine. Diesel consumption can be reduced by between 5% and 7% depending on machine-type and the type of work being undertaken.
What happens if I run out of AdBlue?
You should always carry a spare 10 litre can of AdBlue with you in case of emergencies. If you run out, drive immediately to your nearest AdBlue supply to refill. Your vehicle will be operating illegally if you are driving without AdBlue and the injector nozzle and catalyst will suffer damage.
Is AdBlue harmful?
AdBlue is not harmful to humans or animals. If you get it on your skin or clothes, rinse with plenty of tap water as it may irritate due to the ammonia content. It is not poisonous but if ever consumed accidentally you should drink tap water and consult a doctor. Clean spillages immediately with plenty of water as left untreated it can corrode surfaces.
Is AdBlue classified as hazardous?
It is not subject to any hazardous regulations.
It is a non-toxic, non-flammable, non-explosive fluid, it does not burn and will not aid combustion. It is therefore very safe to use.
How long does it keep for?
AdBlue, if stored according to guidelines,
will keep for at least 12 months.
How do I store it?
AdBlue should ideally be stored indoors,
between 0 – 30˚c, out of direct sunlight and
properly sealed when not in use.
Can I decant it into other containers?
We strongly recommend that you do not
do this as it may become contaminated and
some containers are not suitable. Always
keep it in its original HD plastic containers
and use properly approved pumping
equipment. The ammonia content in
AdBlue will cause etching to the following
materials: brass, copper, aluminium, mild
steel, which in turn will contaminate the
product, potentially harming your vehicle.
Can I leave it in my combine harvester
AdBlue will remain in good condition for
12 months if kept sealed. Before operating
your machine we recommend you test the
AdBlue if it has been left un-used over a
period of time.