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• NITROGEN IN CAR TYRES: What's the point of filling car tyres with Nitrogen? (FAQs)
  Compressed air contains Oxygen and Nitrogen in roughly a 20% to 80% mix. It does however contain other gases as well as water, water vapour and dirt / grease. Certain components namely Oxygen, water vapour and free water that are found in compressed air are prone to permeation through
• ADBLUE: What is AdBlue and What do I need to know about it? (FAQs)
  the engine, and inside the high temperatures of the Selective Catalytic Reduction (SCR) catalyst the AdBlue turns into ammonia and carbon dioxide. The ammonia reacts with the nitrogen oxides in the gases and are turned into nitrogen and water - neither of which are harmful. Disadvantages of AdBlue
• MISFUELLING A CAR: What should you do if you accidentally put the wrong fuel in your car?  (FAQs)
  is it for? AdBlue is a trade-name for the most popular Diesel Exhaust Fluid (DEF), now used in many modern diesel vehicles to reduce the amount of nitrogen oxides created by diesel combustion. It is composed of deionised water and urea and works by mixing with exhaust fumes to change them from nitrous oxide (NO2