I would agree with those figures. I got my SS V a month ago & on a trip it is consuming about 12l/100km, around town about 15l/100km.
Pretty decent figures I reckon considering the power that you have on hand.
Previously I had an Audi Allroad which was a 2.7 litre 6 cylinder (tho twin-turbo)...
Here is another beach scene one, these photos were taken at Pauanui on the east coast of the North Island, Coromandel Coast area, lovely white sand beach and normally pretty good surf. We've got a beach house there.