As you may know, the motorway milage varies greatly with speed driven at. So, when comparing across cars, please keep in mind that motorway driving habits vary a lot. One of my friends, a regular hypermiler, has never gone above 100, while i have never gone below 100.
I have a new swift DX, driven almost 3000kms by now. On the motorway, I drive (with AC) at a set speed of 120, with over-taking/racing at 140. I have never spent more than 30-32 liters of petrol (home to home: 400km). The same on my GLi cost me 42-45 liters.