I assume you mean fuel consumption, which will rely on driver habits. The gas mileage boasted about by car companies are in the best conditions and when abiding by the laws of the road. Most people wont see the actual advertised mileage, especially if you are looking at the combined highway/city mileage they give out, which will vary greatly depending on the ratio of driving on highways vs cities.

 

All depens on how you drive it but yes manufactures claims are under ideal driving and conditions so this is not the only car that does not meet it , probably 10l/100km