So the point is that these official numbers should be taken with a generous pinch of salt. Now, when you talk about GM, remember this is data from Germany, so

So the point is that these official numbers should be taken with a generous pinch of salt. Now, when you talk about GM, remember this is data from Germany, so GM essentially means Opel. Now I believe that before the quite successfull Insignia which launched in 2008, Opel were mainly known for cheap and efficient and small cars like the Corsa and Astra, while now they have a more premium lineup, and "Turbo" versions of several models.