Ok I just worked out that an extra 22 miles is a £3.69 saving.
So if it is £4 extra its actually only 0.31p more?
Thats at £1.40 for V-Power which is what I roughly pay.
If you pay more then the saving is more, as you have not put what you pay I can only go on what I pay.
Unless I worked it out wrong, 4.54 litres to the Gallon.
Anybody else want to do it, its all approximate.
22 miles over 38mpg equates to 58% so its fairly easy.
Its late/early so forgive me if I am wrong.