Is Your Car Burning Through 75% More Fuel Than You’d Expect?


A huge discrepancy in the amount of fuel used compared to the figures given by car manufacturers could be costing motorists an additional much as £800 per year. Worldwide number one car app, Carly Connected Car carried out a survey of over one million vehicles worldwide (150,000 of which are based in the UK) which showed that many cars could be burning through as much as 75% more fuel than stated by the car manufacturers.

Carly uncovered discrepancies were greatest in the three most popular vehicle segments in the UK; small cars, compact cars and SUVs. Drivers of small cars could be using as much as 55% more diesel and 35% more petrol than the official figures, adding hundreds of pounds to annual running costs. For compact car drivers the real-life diesel consumption recorded as 45% higher than manufacturer figures with the news no better in the increasingly popular SUV segment; burning through 45% more diesel and 40% more petrol than owners might expect. The only segment of vehicle where manufacturer data reflected real-world results was Diesel sports cars where real-world figures matched the data given by the car makers.

The data showed year-on-year growth of discrepancies in MPG in every new model generation since 2004. The most significant difference was found in diesel cars from 2016, with an average of 75 percent higher consumption rates than stated in information given by the car maker. According to the RAC Foundation, the average given MPG for a diesel car in 2016 was 62.5mpg. So, for a motorist driving 12,000 miles, at a cost of £1,087.55 per annum (based on current diesel costs of 124p per litre), this figure could instead be £1903.21, an additional cost to the motorist of £815.66 a year.

“There is an ongoing conflict of interest regarding fuel consumption. Over the years the regulations require less and less CO2 emissions, however, drivers want more powerful and luxurious vehicles,” says Avid Avini, one of Carly’s founders. “With each new CO2 reduction strategy, manufacturers have had to reduce fuel consumption, however, due to tests being carried out in laboratories rather than the real-world, the data shows consumption to be improving. Miles per gallon is one of the key concerns of UK drivers when buying a car as the on-going vehicle running costs can have a huge impact on a monthly budget.

While it can be difficult for manufacturers to predict consumption, as it is very much dependent on individual driving style, a discrepancy of this size is of concern to consumers relying on manufacturer figures.”

Carly’s Connected Car app, available for BMW, MINI, Mercedes, Renault, Volkswagen Group cars, performs a manufacturer- quality diagnostic session in minutes, providing insight into actual mileage, fuel economy as well as fault codes logged in the car. Prices start at £44.90 for the adapter (available from Amazon UK) with the app (either iOS via the app store or Android via Google Play) available in both Lite and Paid versions.


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