Are you familiar with the situation, too? Your car guzzles much more fuel than indicated.
Drivers cannot rely on the official fuel consumption data for their vehicle actually reflecting reality. After purchasing a supposedly fuel-saving car, the additional consumption at the petrol pump and demands on one's wallet often become evident.
Car manufacturers are obliged to issue honest fuel consumption figures. The corresponding EU regulation 715/2007 stipulates that type-approval CO2 and air pollutant emissions have to be aligned with those emitted on-road throughout the normal life of the vehicle under normal conditions of use.
But, in reality, official fuel consumption figures do not match real-world values. And the gap between official and on-road fuel consumption keeps growing consistently for 15 years now: While in 2001 the average deviation from type-approval fuel consumption levels came to 9%, in 2015 it reached an average value of around 42%. During this time, there has been no change in the EU test procedure for measuring CO2 emissions.