At £5 per gallon now, have you considered that your car is doing an average of 30 MPG?
You could get more mpg by changing your driving style. I have a new(ish) car with a 1.3L engine and I only get 40mpg without thrashing it.
It's the greedy government. More and more people are now realising the cost in money rather than in fuel economy.
Dave
February 2008