Making your fuel go further

I was reading through the Summer 2008 edition of 4x4 Magazine (we advertise in there) and found these points in a letter from a reader. I hope it helps make your fuel go further.

• Only buy or fill up your 4x4 in the early morning when the ground temperature is still cold. Remember, all petrol stations have their storage tanks below ground, and the colder the ground the more dense the fuel. When it gets warm petrol expands, so if you buy fuel in the afternoon or evening your litre is not exactly a litre.
• Fill up when your tank is half full. The more fuel you have in the tank the less air is occupying the empty space - petrol evaporates faster than you can imagine.
• Avoid filling up if there is a fuel truck pumping into the storage tanks when you stop to buy. It's likely that the petrol or diesel is being stirred up as the fuel is being delivered and you might pick up some of the dirt that normally settles on the bottom of the tanks.