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Car manufacturers are still cheating fuel economy tests by up to 12 miles a gallon - despite VW diesel emissions scandal

Daily Mail logo Daily Mail 5 days ago James Salmon for the Daily Mail
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Car manufacturers are still exaggerating fuel economy by up to 12 miles a gallon, despite the introduction of tough tests after the diesel emissions cheating scandal.

An audit of popular cars in Britain revealed new official fuel economy tests brought in late last year are providing much more accurate results.

However, it also found the vehicles are achieving about three miles a gallon less than claimed on average, rising to 12 miles in the most extreme case.

a police car parked in a parking lot: Car manufacturers are still exaggerating fuel economy by up to 12 miles a gallon, despite the introduction of tough tests after the diesel emissions cheating scandal © Provided by Associated Newspapers Limited Car manufacturers are still exaggerating fuel economy by up to 12 miles a gallon, despite the introduction of tough tests after the diesel emissions cheating scandal

According to tests carried out by What Car?, the Ford Fiesta EcoBoost 140 petrol model has an official economy – based on the new tests – of 48.7mpg. In reality, it managed only 38.3mpg.

The Volvo V60 D4 diesel achieved an official score of 52.3mpg. In reality, it managed 40.1mpg.

a car parked on the side of a mountain: An audit of popular cars in Britain revealed that vehicles are achieving about three miles a gallon less than claimed on average, rising to 12 miles in the most extreme case © Provided by Associated Newspapers Limited An audit of popular cars in Britain revealed that vehicles are achieving about three miles a gallon less than claimed on average, rising to 12 miles in the most extreme case

Steve Huntingford, editor of What Car?, said: 'It's great to see that the new, tougher tests have closed the gap so significantly. 

'But the gap between official figures and our real-world tests remains, on average, at almost 5 per cent. We will keep testing until the gap is gone.' 

Related: Revealed: the best and worst cars for fuel light roulette [Motoring Research]


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