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AdBlue in diesel fuel specialist


AdBlue in diesel tank by mistake

AdBlue (NoX) system reset after refilling with AdBlue

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What happens if I refill the AdBlue and the level not correct?

To help avoid confusion, a lot of vehicles have a blue fill cap for the AdBlue™ tank and black, red or green for diesel, and on many HGVs the AdBlue™ and diesel fill points are positioned quite far away from each other. However this isn’t fool proof and a driver mistakenly putting AdBlue™ into the diesel tank can have disastrous consequences.

If the unfortunate situation arises that a driver has added AdBlue™ in the diesel tank, this can cause costly damage. AdBlue™ is not compatible with many materials so it can corrode the pipework and components in the fuel system. This can cost thousands of pound worth of damage, not to mention the loss of use of the vehicle until a professional gas drained the tank, flushed out the system and carried out all repairs.

In order to meet Emission Standards, diesel vehicles need to reduce their emissions down to a certain level depending upon the engine size. In response to this, exhaust technology has been introduced that uses a fluid known as AdBlue™ (DEF) to reduce the Nitrous Oxides present in emissions.


AdBlue™ is commonly mistaken as a fuel additive, when in fact it should not be mixed with diesel at all. Whereas diesel is for the running of the engine, AdBlue™ is designed for the SCR system in the vehicle exhaust and therefore is dispensed into a completely different tank to the diesel.

AdBlue is injected into the exhaust stream of diesel engines to reduce the amount of NOx emitted, helping them to meet emissions regulations. Without AdBlue, diesel engines will produce more pollutants than allowed by law, and will fail emissions tests. Please check the owner's manual.

Engine start not possible in certain miles repair
AdBlue in diesel tank by mistake

AdBlue is a water-based fluid, uses specifically in diesel vehicles equipped with Selective Catalytic Reduction (SCR) technology, and it is strictly not fuel or additive. It is simply a diesel exhaust fluid (DEF) to convert harmful gases into water and nitrogen.

AdBlue is corrosive liquid and has detergent and crystallization properties. This can have various devastating effects on your car’s engine and fuel assembly, such as;


1. Damaging the fuel lines, and especially the fuel pump by clogging the small inlets and valves.


2. As it gets crystallized, it can clog and damage the fuel filter, and fuel injectors as well. This can hamper the performance and fuel economy of the car.


3. As it decomposes the lubricants and other protective layers inside the engine, it can increase friction and heat generation, damaging the engine beyond repair.

To avoid these problems, simply call us anytime and get your fuel system drained professionally and environmentally.

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