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I won't name the manufacturer, but recently the Advertising Standards Authority (ASA) upheld a complaint which will force carmakers to include a disclaimer in adverts to explain that quoted mpg figures may not reflect real-world performance.
It's not uncommon that we hear from disgruntled drivers unable to replicate the mpg figures claimed within the marketing materials for their vehicle.
This is because fuel economy figures are based on rolling road tests completed in laboratory conditions in accordance with European regulations.
In short, the tests are carried out in perfect conditions and we very rarely drive in perfect conditions. They don't take into account things like undulations in the roads, poor weather, auxiliary equipment being used or driving style.
The reason I didn't name the manufacturer earlier on is because this is an issue across the board - all car manufacturers test their vehicles in this way.
When you are looking to select a vehicle, it is important not to bank on it delivering the fuel performance claimed all of the time - the likelihood is that it won't happen.
However, that shouldn't stop you from trying to get as close as possible and that's where driver behaviour is so important.
Irrespective of how efficient the vehicle is, you can have a huge impact on fuel consumption through the way that you drive.
Small reductions in speed and smooth acceleration and braking make a difference, as does removing weight from the vehicle (for example, taking the golf clubs out of the boot when you don't need them).
Over time, if you are consistently driving efficiently, you can generate significant savings which will push you closer to the performance claimed by the manufacturers.
It's also a discipline that may become more prominent with the emergence of new vehicle technologies.
For example, if you were in a fully electric car, effective use of the brakes, removing weight, watching your speed and operating smoothly and efficiently wouldn't just save you money, it would allow you to manage the range of the vehicle.
So be savvy, don't believe everything that you read, and influence your own fuel usage because it really is a good habit to get into.
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