Miles per UK gallon...
Traffic was quite heavy and I had to negotiate several town centres at busy periods. Still managed to get in some spirited driving and overtaking and found the twisties far more interesting than the motorway.
The point I'm getting to is, when I checked my trip data, I was amazed to find that I'd averaged 31.6 mpg for the 122 mile journey.
The journey took me less than half an hour longer than if I'd used the motorway un-congested!!
What's the best mpg you've recorded so far?