Recent comparison tests in Germany show that switching from Super (E5), the fuel blend containing 5% ethanol, to Super E10, the blend with up to 10% ethanol, can reduce NOx and particulate matter (PM) emissions significantly, while fuel consumption stays more or less the same.

The German Bioethanol Industry Association (BDBe) announced that Super E10 achieved an average reduction of 25% for NOx emissions in tests with five cars. For PM the average reduction was more than 70%, when compared to Super (E5).

BMW, Ford, Opel, Renault and VW models from different vehicle classes were used in the tests.

Since Super E10 was introduced, many people have been assuming that fuel consumption would be higher because of the lower calorific value of bioethanol compared to mineral oil, but the association said its tests did not confirm that. Fuel consumption was higher with two of the five cars tested, growing by 0.09 liters per 100 km for a Ford Fiesta 1.1 and by 0.04 litres per 100 km for a BMW 318i, while it actually decreased in all other cases.


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