New Data Suggests Most Diesel Cars Fail Real-World Emissions Tests

New Data Suggests Most Diesel Cars Fail Real-World Emissions Tests

A scathing new study has been released suggesting that 97 percent of all modern diesel-powered cars fail to meet emissions standards when subjected to real-world testing.

The data, which comes from the EQUA Air Quality Index‘s Real-World Vehicle Emissions Ratings Programme, suggests that most diesel cars pollute by emitting more toxic NOx than is legally allowed and that a quarter of them produce at least six times legal limits.

The study, which looked at more than 250 modern diesel vehicles in Europe, says virtually all manufacturers have diesel cars that pollute far more when they undergo more stringent real-world testing. Cars tested in the lab typically pass standardized government testing, but when taken out on real roads, nearly all of the cars tested emit more pollution.

ALSO SEE: VW to Buy Back or Fix Cheating Diesels, Compensate Owners

An interesting finding from the study is that Volkswagen diesels, which sparked increased scrutiny when it was discovered they were rigged to cheat emissions testing, were not the worst offenders in terms of how much they polluted. Some of the cars the study says emit more than 12 times the legal limits come from automakers including BMW, Hyundai, Jaguar, Land Rover, Mercedes-Benz, Nissan, Porsche, Volkswagen and Volvo, among many others. Nearly every automaker that sells diesels, however, appears somewhere on the spectrum of surpassing the legal limits for pollution.

The study doesn’t suggest that automakers are breaking the law or have engineered their diesels to cheat, but perhaps suggests that stricter and more accurate testing is required.

[Source: The Guardian]

  • me ohmy

    oops…that icky nasty gasoline is cleaner…Ooh burn

  • nauticalone

    No surprise. And most countries are failing miserably at effective testing or policing it also!

  • Jonny_Vancouver


  • Jonny_Vancouver

    How about we don’t waste any more time developing diesel technology and focus on moving forward with hybrid and electric drive-trains.