I do not know the rate of fuel consumption or really anything else for this car but, seeing as no-one has replied, allow me to offer a very rough guide: the distance you mention is close to being half of what you might get (at best) from a full tank. A tank typically takes 50 litres - ergo, you might expect to burn some 25 litres or more. It very much depends on whether in urban or long-haul conditions, what the style of driving is like, whether the vehicle is heavily laden, etc. I would expect the maximum consumed to be 35 lites.