Our computer finally stopped changing value after accumulating 3500miles (5000km) of total driving. Now it stabilized on 26.3MPG (9.0L) and is staying there last 3 tanks of gas. We do everyday driving from Kitchener to Hamilton, so it's mainly highway. I would say 20% city 80% highway. Our average speed on computer is 29.8mph (48km). However, for those who does mostly city traffic average speed should be much lower and consequently MPG drop will follow. For example on very short trips in cold morning when engine is cold and needs to warm up, thus wroking not efficiently and driving only in city with traffic lights and some hills - basically worst scenario - I've seen computer show as low as 12.5MPG (18.7L). So I think fuel consumption in Murano greatly depends on kind of driving one does. On the other hand best case scenario was when I was driving purely on highway for close to 1 hour and MPG got to as high as 33,6MPG (7.0L) - that was a calm driving on a flat highway without traffic and maintaining speed not higher than 60-65mph. But then again, our Murano is FWD and SV - meaning it weighs good 250lbs less than some Platinum AWD. Not that it matters much on highway, but still impacts MPG somewhat to a lesser degree.