Opel will reduce its NOx emissions on various engines CDTI Euro 6


The Opel Astra will be the first model of the brand to be tested with the cycle WLTP

General Motors seems to have turned a deaf ear to the criticisms there are against Diesel engines, having learned almost all that emissions of oxides of nitrogen (NOx) they are apparently out of control when there are cars in a lab, and at various manufacturers.

while the manufacturer has always denied that its cars have a programming hidden -to detect that they are in a laboratory and emit less gas – it will perform an upgrade of some 43.000 Insignia, Zafira Tourer and Cascada/Cabrio CDTI type-approved to Euro 6 legislation.

the brand’s engineers are working to “… to improve the effectiveness of the treatment systems of exhaust gases in diesel engines, Euro 6 with SCR technology …”. We speak of engines with selective catalytic reduction, which require an additive (urea/Adblue) to reduce their emissions of nitrogen oxides.


Several independent tests suspect that Opel has a programming hidden in their engines to detect evidence of gas

The improvement will also affect the models that come factory-new. It is a call to review covert, that no european institution has asked yet. Volkswagen and its brands, on the other hand, does have such a requirement. Opel assumes that complies with the current regulations, to qualify in the laboratory, but the thing changes with the arrival of the road tests real.

The limits of the Euro 6 legislation of 80 mg/km of NOx, which Opel meets in the precise conditions of approval, with the appropriate preconditioning. Independent tests say that if it is not in these specific conditions, NOx emissions will soar, putting as examples the Opel Zafira 1.6 CDTI with SCR. Opel doubt of the truthfulness and accuracy of such tests.

therefore, if we read the official press release with a bit of bad milk, we came to the conclusion that, indeed, on the open road, the figure of 80 mg/km would not be met, it would be higher. Anyway, the EU has raised the hand in relation to what they can actually contaminate the cars once tested in actual road, 168 mg/km, so that should be under that figure.


The criticisms of Opel/Vauxhall have been left in the German television (Der Erste) and the uk (BBC One)

in Parallel, Opel has announced that in the second quarter of 2016 will begin to publish the data of fuel consumption and CO2 emissions with the cycle new approval, named WLTP, in addition to the figures with the current method. The press release states that it is an action “voluntary,” since even this is not mandatory.

Will begin by the Opel Astra, and will be followed by the rest of models

fuel consumption and emissions will be, obviously, higher than that we know now, but will be much more realistic according to a driving usual. One of the improvements of the WLTP is to remove the cars from the laboratory to test them on traffic conditions real. Previously,PSA Peugeot Citroën said it would do the same thing, but with independent audit.

Little by little, more and more manufacturers will be joining together to “transparency”, before it is obligatory and not be able to brag about it. Cars that really meet the current regulations of emissions can be count with the fingers of the hands, the rest does not. The excess NOx worsens the quality of air in the cities -creating toxic ozone-, while the CO2 gets worse the consequences of climate change.