I've got 2200 km on my 08 H2 now, and just got back from a short road trip.
I went 360 km (225 miles) on 57.5 liters. (15 US Gal)
According to my calculation, that's 15 US MPG (Almost 17.8 Imp. MPG) on the highway.
That's right around what I expected, if it get any better once it's broke in, that even better.
Is that what others are getting with the 6.2L H2?
What's funny is I'm getting just about the same around the city!

 

I think that is pretty good. 10-12 is what my 03 gets.

 

This should be around 16 liters per 100 km. Looks pretty good.
Our 2008 H2 SUT with 4400 km on board is doing 17 to 18 liters per 100 km. Yous should have a very light right foot.