So what does make a difference to car fuel economy? Well, accelerating gently, driving slower and turning off the engine when stationary for more than a minute. So this June the challenge is to drive slower to save fuel.
How much slower? I'm going to leave that up to you. If you tend to drive at "speed limit plus ten", you might try driving at the speed limit. It could save more than money - it might save your license or even your life. If you tend to stick to the speed limit, you could try driving at "speed limit minus ten percent". It's up to you.
Don't forget to vote in the poll in the right-hand sidebar.