Product Description: 10 LITRES OF FEBI BILSTEIN GERMANY ad Blue *** WITH FREE FILLING SPOUT *** AdBlue converts harmful NOX from your diesel vehicle exhaust into harmless nitrogen and steam, therefore considerably reducing the emissions of nitrogen oxides (NOX) that are a major source of atmospheric pollution and that lead to smog in urban centres. According to studies done by the World Health Association, NOX emissions are known to aggravate asthma. Since 2005, legislation on diesel vehicles in the UK Ireland and in the rest of Europe demands a drastic reduction of NOX emissions. Vehicle manufacturers, and first and foremost those of large goods vehicles, have had to re-think the exhaust system on their vehicles. More and more diesel cars, tractors and other off-road vehicles are.