I have a VX SS auto, on a trip it is brilliant but not so flash around town.
Last weekend I did a trip to Northern Victoria I did 485km on the trip and I had over a quarter of a tank of fuel left when I got home, computer said I still had 190km to empty, this was cruising at 110km with the cruise on, so they are very good on the highway, I worked it out on the refill that it was around the 10lt per 100km, never really worked it out around town but would think it would be maybe in the low to mid teens per 100km, depends how hard on the go peddle you are and how bad traffic is, would not surprise me to see high teens in bad traffic short burst or giving it a bit. They have a 75 litre tank by the way.