Our best and worst True MPG results of 2017

What Car?'s laboratory tests use real-world driving routes to show what fuel economy you can really expect from a car. We look at our top 10 performers for 2017 and the worst...

1. Our best and worst True MPG results of 2017
Vauxhall Astra, Renault Kadjar, Seat Ibiza and VW Up
Volkswagen Up 1.0 TSI 90
Seat Ibiza 1.0 95
Renault Kadjar 1.5 dCi 110
Skoda Citigo 1.0 60
Suzuki Baleno 1.0 Boosterjet
Volkswagen Up 1.0 75
Seat Leon 1.6 TDI 110 Ecomotive
Vauxhall Astra 1.6 CDTi 110 Ecoflex
Suzuki Celerio 1.0
Suzuki Ignis 1.2 SHVS 2WD
Audi SQ5
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Over the past 12 months, we've put all manner of cars through our True MPG testing. We use real-world driving data to create a virtual test route that allows us to accurately measure how much fuel a car uses in town, on the motorway and on country roads.

By doing this, we avoid producing the kind of overly optimistic results you're likely to see from official testing. We aim to produce an economy figure you can really expect to achieve in mixed driving if you're sensible.

To make sure our figures are as accurate as possible, we carry out testing in a laboratory on a rolling road. That means there are no variables such as wind, rain or other traffic to affect the result.

Click through this slideshow to see our top 10 best True MPG performers in 2017, and the worst.

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