I've been using an app called
Roadtrip since march. It's available in a free lite version as well. Really good app to keep track of your fuel costs, expenses, servicing ect.
Gives a running average of your MPG so since switching to V power, i can monitor any MPG change
![happy2 :happy2:](https://www.mk5golfgti.co.uk/forum/Smileys/newsmileys/happy2.gif)
Give it a whirl, iphone dubbers