Hi,
You have to have five posts before you can drop in some pictures. You're almost there.
I second Daox. You can do better than 50mpg in a VX, but you should expect it to take some effort on your part. The VX is supposed to be great for mileage. I don't know how much you can accomplish with just tuning.
Just as an example of what's possible,
The Donkey CRX has blown far, far past that level with his two cars, but in both cases everything he does is about drag reduction, giving the engine less to do. And then when you look at his fuel logs, you'll see his tanks are up to 20% engine off coasting - over a hundred miles per tank.
Good luck finding an unmodded VX. That's hard. I want one myself and I've pretty much given up hoping, but more power to you.