Alright, I'll give you my metric numbers, cause you're using imperial gallons, I was using US gallons. In summer I usually got over 500ks on a tank (47-50L)and that was city and hwy combo, i've never actually taken a long trip with the car yet, but I'm going down to minneapolis this next week, I guess I'll see then how the car truely does on the highway.
But ever since my cat problem, I haven't been getting very high mileage, like I'm at 380ks on this tank and almost empty and about 250 of that is highway driving.
Oh well at least gas is cheap right now ($.45/L)