Cool! Think I'll try 99 grade once got the car's got some mile on the clock
If you can get the car off your wife! 
My mrs loved the Ed30 she didnt want to part with that!! Now she loves The GTD and all the toys, and she dosent drive it neather even the ACC she likes to ajust that to her liking!!
Your GTI should settle down a bit after about 2k miles hope it gets better? Around london the GTI is poor for MPG?

ps there's only a second in it?