- Photo credits YourMecanic

According to new research, diesel cars emit almost no NOx

Are diesel cars finally clean?

1y ago
28.2K

Although many cities have pointed the finger at diesel cars because of their polluting gas emissions, they are said to have become much cleaner than we think. According to independent studies, some Mercedes, Vauxhall (Opel) and BMW models emit almost no nitrogen oxides (NOx) even during the most demanding road tests.

The German Automobile Club (ADAC) has conducted real-life road tests of several petrol and diesel models to assess their pollution levels. Many vehicles performed significantly below the 168 mg of NOx/km currently allowed by the Euro 6d Temp norm.

It is important to note that, based on the WLTP norm, these limits are set at 80 mg/km for diesel cars and 60 mg/km for petrol cars. The results are surprising. The Mercedes C220d emitted no NOx at all while the BMW 520d emitted only 1 mg/km. The Vauxhall (Opel) Astra diesel also emitted only 1 mg/km. The Citroën Berlingo BlueHDi also impressed with 7 mg/km.

In some cases, diesel cars even emitted less NOx than petrol cars. All these measurements were taken under real driving conditions, i.e. with the maximum limit of 168 mg/km! This is therefore an excellent surprise that could, if politicians accept it, be a comeback for diesel.

Photo credits L'Argus

Photo credits L'Argus

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Comments (60)

  • The article only addresses NOX not CO2 or Small Particle emissions (less than 2.5nm) , as a result the particles are extremely hazardous to human lungs and health. BEV are much cleaner to run running at 70% energy conversion overall efficiency compared to 18% for ICE vehicles. Simple maths means BEV will win out.

      1 year ago
    • Sadly the majority is dumb.

        1 year ago
    • I think you'll find there are an equal number of topics that you fail to grasp... I won't resort to name calling though..

        1 year ago
  • Thats why Mazda said its probably better to drive diesel then electric due to less emissions of CO2 then Petrol and nearly clean nox emissions.

      1 year ago
  • There's a joke in Germany about that right now, by some comedian: "If you want the cleanest air in Stuttgart, lat behind a Mercedes diesel". In reference to the fact that tests in Stuttgart have determined that the air coming out of the back is ckeaner tha the air the car sucks in

      1 year ago
  • According to an organisation from the Nation most heavily invested in diesel. For a real test of emissions, try breathing the carcinogenic fumes from any diesel, no matter how new it is.

      1 year ago
  • Well... time to roll coal as I drive past a charging station.

      1 year ago
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