Yep. I am beginning to notice the same Dark Matter. I used to apparently drive like Miss Daisy, which caused my previous car all sorts of carbon issues and was told to drive it hard. When i drove it hard the MPG went right up so i intend to do the same with the Aygo and ignore the gear change symbol. In my opinion, and i'm no mechanic, 38MPH is way too slow for 5th gear. Maybe good for the planet but not good for my pocket.