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• NITROGEN IN CAR TYRES: What's the point of filling car tyres with Nitrogen? (FAQs)
  Formula 1 Grand prix racing have used Nitrogen for decades as the tyre pressures are so critical and nitrogen is a dry, inflammable gas. Standard compressed air, contains 78% Nitrogen, 21% Oxygen and 1% other gases. It also contains water, both in free form and as vapour.
• ADBLUE: What is AdBlue and What do I need to know about it? (FAQs)
  The science involves miniscule amounts of Adblue added to the exhaust gases coming from 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 Adblue solution itself will freeze at -11̊˚C, therefore the storage tank of the vehicle for the Adblue will almost certainly have to be heated to ensure the ambient temperature doesn’t drop below -10˚C.
• MISFUELLING A CAR: What should you do if you accidentally put the wrong fuel in your car?  (FAQs)
  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) to harmless nitrogen, water and carbon dioxide.
• 
  Review: Airlabs Airbubbl (productReview)
  Airlabs claims it's the  only type of filter available that can absorb harmful gases, like nitrogen oxide, as well as particulate matter. Research has shown that commuters who sit in traffic for an hour every day are exposed air pollution that is equivalent to passively smoking 180 cigarettes each year, with air pollution levels inside a car being over 20 per cent higher than outside.
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  Top 10: Car-related “movers and shakers” from Amazon (Article)
  Buy a pair here AdBlue Modern diesel engines almost all use AdBlue to break down NOx emissions into harmless Nitrogen and Oxygen. Very little is used by a car, so the AdBlue tank only needs to be topped up every few thousand miles. Buy it at a service station and it costs a fair bit, though. It’s way, way cheaper to buy it on Amazon, so it’s not a surprise it’s among the more popular car products available on the site.
• 
  Review: Dyson Pure hot+cool purifying fan heater (productReview)
  A small, circular, LCD display on the body of the Pure hot+cool also give us very helpful insights into factors that affect our air quality in the office, including information about humidity, particulate matter (PM), Nitrogen Oxide (NO2) and Volatile Organic Compounds (VOCs) - which can lead to a whole host of health problems. You can use t he remote control to cycle through the different displays. VOCs are toxic chemicals that are found in cleaning sprays, nail polish remover, spray-on deodorant, air freshener, paint etc - while particulate matter like dust can trigger asthma and other respiratory illnesses.
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  ULEZ van checker - Will you have to pay the low emissions charge? (Article)
  This means some older vans and pick-ups with exceptionally low emissions for particulate matter (PM) and nitrogen oxides (NOx), are exempt from ULEZ charging. All new diesel vans sold from September 2016 should meet the Euro 6 standard, while all new petrol vans registered with the DVLA from January 2006 should meet the Euro 4 standard.
• 
  How to buy a new van (Article)
  Important: Vehicle emissions are a hot political potato at the moment, with health groups lobbying the Government over air quality. Diesels are among the worst offenders, emitting nitrogen dioxide (NOx) and particulate matter (PM) that are linked to a wide range of health problems, including heart disease and cancer. The problem is so great that in London alone diesel emissions are linked to 10,000 premature deaths every year.
• 
  Paris introduces classic car ban 20 Jun 2016 (News)
  There are already rumours that other European cities will follow the lead of Paris, with London in particular struggling to lower its emissions and meet EU nitrogen oxide levels. Is it only a matter of time before the UK’s major cities adopt similar measures? WHAT DO YOU THINK? Do you agree with Paris’ ban on pre-1997 cars during weekdays?
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  New £2000 diesel scrappage scheme set to be announced 20 Apr 2017 (News)
  So why is there a need for the scrappage scheme? In 2013, almost 12,000 premature deaths were linked to nitrogen oxide, according to the European Environment Agency. Diesel cars emit a high quantity of Nitrogen Oxide , which are linked to respiratory diseases like asthma, with older models said to be particularly polluting.
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  Classic diesels face threat from air quality ruling 2 May 2015 (News)
  Classic diesels could come under pressure after the Government was ordered to comply with tough European air pollution limits. The Supreme Court decision aims at reducing nitrogen dioxide emissions, which are largely produced by diesel engines. It comes just months after Honest John Classics warned of a new scrappage scheme for diesels .
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  'Urgent action' required to combat car tyre and brake dust pollution 11 Jul 2019 (News)
  The industry's concentration on reducing tailpipe emissions has contributed to a 29 per cent improvement in nitrogen oxide emissions since 2010, while sulphur dioxide emissions are down 62 per cent.
• 
  First Diesel Engine to Meet Euro 4 Emission Regs 17 Dec 2002 (News)
  Water-cooled exhaust recirculation lowers the temperature of recycled exhaust, cutting NOx emissions. "The 1.7 CDTi ECOTEC engine successfully restricts both particle and nitrogen oxides emissions to the area in which they are produced, thus reducing exhaust emissions," said Rita Forst, managing director of Opel Powertrain. She said the engine can be introduced into the market in smaller cars in large numbers.
• 
  Should classic cars be scrapped? 6 Oct 2015 (News)
  For a start, the majority of classic cars use petrol engines and therefore don’t emit anywhere near the amount of nitrogen oxide (NOx) as modern diesel engines do. And, after all, it was this NOx figure that Volkswagen was trying to cheat. But the argument goes way beyond petrol versus diesel. It’s how classic cars are used that means these clunkers with their ‘old’ engines shouldn’t be scrapped.
• 
  SMMT issues a statement on Volkswagen emissions scandal 23 Sep 2015 (News)
  A range of emissions is tested, including carbon monoxide, particulate matter, hydrocarbons and nitrogen oxides (NOx). What is the test? It is a laboratory test, which ensures consistency and absolute comparability from one vehicle to another. The vehicle is put onto a ‘rolling road’ and fitted with equipment to measure emissions.
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  Used Van Buying Guide: Mercedes-Benz Citan 2012 -2019 26 Nov 2019 (News)
  Another voluntary recall was issued in July 2017 relating to engine software, in a bid to reduced nitrogen oxide emissions. Ask the seller if this has been done - again, they should have paperwork to prove it.  Always check whether it idles smoothly, if not it could point to problems with the ignition coils.
• 
  Sustainable Mobility, According to Renault Eco2 16 Jun 2010 (News)
  Instead of simply recirculating high pressure hot exhaust gasses via an EGR back into the inlet manifold, the low pressure system takes the post particulate filter gases, cools them via a heat exchanger, then re-introduces them to the turbo compressor after which they are cooled again by the intercooler before being reintroduced to the combustion chambers. This cuts emissions of nitrogen oxides far more effectively than a conventional EGR. A further innovation is a variable displacement oil pump that absorbs less energy than a conventional high-pressure oil pump with relief valve.
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  Huge Engine Technology Breakthrough From FIAT 7 Mar 2009 (News)
  * Optimum valve control strategies during engine warm-up and internal exhaust gas recirculation, realised by reopening the intake valves during the exhaust stroke, result in emissions reductions ranging from 40 per cent for unburnt hydrocarbons and carbon monoxide (HC/CO), and up to a 60 per cent cut in oxides of nitrogen, (NOx). * Constant upstream air pressure, atmospheric for naturally aspirated and higher for turbocharged engines, together with extremely fast air mass control, cylinder-by-cylinder and stroke-by-stroke, result in a superior dynamic engine response, and enhanced driving pleasure.
• 
  Honest John's Motoring Agony Column 6-6-2015 6 Jun 2015 (News)
  If I switch the engine off once warm and restart, the light no longer appears. I have had the fault diagnosed by an official BMW dealer and have been told that the Nitrogen oxide sensor and the pulse generator on the exhaust camshaft require replacement at a cost of £621. The garage in Northwood is insisting that it carries out its own diagnostic check to determine if the diagnosis already carried is correct.
• 
  Tyre inflation - nitrogen vs normal air 14 Dec 2012 (Ask HJ)
  I am told nitrogen filled tyres rarely need checking because they do not deflate like ordinary air filled tyres. Is this true? Is it worth paying to change...