My new V1k now has just shy of 2k miles. It started out getting 39 mpg. As it's broken in, that has increased to 47.7 mpg. This is mainly backroad flogging with some intermittent highway stuff to get to the good roads.
I seem to remember my ZRX's mileage continued to increase until it got about 3k miles on it. If this one continues to improve, I might break 50 mpg. Impressive for such a spunky lil thing.