Last November I bought a Vauxhall Astra 1.7CDTI Eco with a claimed combined mpg of 62.8. I struggle to get 45mpg, which is more than 25 per cent less than the stated figures. I wrote to Vauxhall expressing my dismay and they wrote back saying "The figures are not intended to be used as an expectation of the MPG that will be achieved during normal use".

It's all well and good telling me this after I have bought the car. Surely on their marketing information this should be visible as the figures are misleading. They also claim that "...as the vehicle is performing within the manufacturer's specifications, we would not look to progress this case any further".