Have any of the people worrying about MPG ever worked out what they spend? 5000 miles at 25mpg at £1.15 is £1046 5000 miles at 20mpg is £1308 a difference of £261 and obviously add about £52 for every extra 1000 miles ( its even less if some of your mileage is in other countries). And this is a big difference. It gets less as the mpg goes up - the difference between 40 and 50 is £130 - sort of makes you think twice about buying a diesel car doesnt it? unless you do a lot of miles. The same people worrying about their MPG are probably the same people walking out of peterborough with £1000 worth of awning that they will probably use once or twice. My message is - buy what you want to buy and use it how you want to use it and stop worrying about it.