We have a Volvo V70, it is a 5 cylinder, 2.5L Turbo. Does at the moment about 11-13L/100km, but it is due for a major service, so I expect it will be back down to its average of 10-12L/100km after that is done.

I run all my cars to dead empty at least once, means I know exactly how far the petrol light will take me if necessary, but we have only had the car a couple of weeks and I haven't had a chance yet.