Her is a good tip for saving fuel on a long journey on the Motorway, in these times of extortion err high energy prices.
1) Potter along at around 50mph in the inside lane.
2) When a National Express Coach thunders past at 70mph, increase speed and pull out behind it.
3) Once you are about 2 feet off its backdoor slow down and keep pace.
Now, not only will you be doing over a hundred miles to the gallon, you will also be able to use their free WiFi