Vauxhall will start publishing real-world emissions figures next summer, as boss calls for greater transparency in Europe
Darren Moss
15 December 2015

Vauxhall will voluntarily publish real-world CO2 and NOx emissions data from the second quarter of next year.

Vauxhall and parent company Opel will publish figures recorded during the World Harmonized Light Vehicles Test Procedure (WLTP) alongside its regular fuel consumption and CO2 figures. The first vehicle to have its WLTP figures published will be the new Astra.

The current ‘New European Driving Cycle’ emissions test - which has been widely criticised as being old fashioned and 'not fit for purpose' in the wake of the Volkswagen emissions scandal - is to be replaced by the more modern WLTP in 2017.

The WLTP is capable of replicating real-world driving more closely than the NEDC, meaning that its claimed fuel consumption and CO2 figures are capable of being replicated by customers. Vauxhall is the first manufacturer to agree to publish WTLP figures ahead of the test becoming mandatory.

Vauxhall says it is also working towards several improvements in Selective Catalytic Reduction (SCR) exhaust treatments in Euro 6 engines. Vauxhall will use SCR as a staple device in its future Euro 6 diesel powertrains in the future.

The fitting of the improved SCR system to new vehicles is due to start next summer, but owners of the current Zafira Tourer, Insignia and Cascada will also have the option of having the system retro-fitted.

Opel boss Dr. Karl-Thomas Neumann said: “The events and discussions in the last weeks and months have shown that there is a tremendous focus on the automotive industry and it is now time to act based on the learnings.

“It is obvious to me that the diesel discussion is a turning point. The world is not as it was before. We cannot ignore this and it is in the hands of the automotive industry to change the perception of the new reality.”

Neumann has called for greater transparency between car makers and authorities in Europe. “In the USA, the companies disclose their complete calibration philosophy to authorities,” he said. “I would like to see us embrace this practice in Europe.”

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15 December 2015
This article makes little sense. The WLTP test is a lab test and not real world testing and is estimated to be 25% away from real world results by 2020. Also the Zafira Tourer and Insignia are already fitted with SCR in the UK to meet EU6?

15 December 2015
What the hell is 'real life results'? That just means everyone who drives the same car will get different results. Seeing as cars are mass produced, there will also be a variance in economy for cars of the same model.

Thus, what you get is a wide range of MPG for a particular car which some people will still struggle to get the lower quartile figure because of their driving style, location and traffic conditions.

A test lab result is the ONLY result to give consistent results across all manufacturers if they use the same test.

Do people seriously believe they'll get 149mpg from a PHEV?

15 December 2015
I am inclined to believe that once the level playing field of data release has reached the whole market, and manufacturers have jostled a bit and found how they can put their vehicles in best light in advertising, it will come back down to people buying what they like the look of, practicality, sportiness, media, pricing/finance deals, or whatever, over and above figures for emissions. Someone is going to have to come up with new labelling too - will "eco...", "blue...", "efficient..." etc become a bit passé?

15 December 2015
The sooner everyone forgets the phase 'real world' the better.
these tests will always be in a lab and if fan boys don't like the results they start totting the 'real world' phase. USE IT AS A COMPARASSION TOOL, and it's not the last word in what car people buy.

typos1 - Just can’t respect opinion

15 December 2015
This would be OK if the margin of error was consistent. These 1.0 3 cylinders seem to be way off you might as well by a straight 2.0.

15 December 2015
I've heard the opposite, but then I suppose it depends on how you drive them.

typos1 - Just can’t respect opinion

15 December 2015
My take on how close modern downsized petrol engines and 2.0 diesels get to their respective claims, because I drive one of each, is that the diesel gets way closer more of the time. Mixed driving just kills the claims for the 1.0 petrol.

Only a steady motorway-only drive raises the average of the little petrols. But it's still noticably far from the claims. There's going to have to be some major fettling going in the next couple of years to prevent some embarrassing increases in apparent consumption of the WLTP vs current figures.

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