Driver tools Litres to gallons converter
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|Convert gallons to litres|
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The cars with the best mpg
Want to know which are the most efficient cars on the market? Our more realistic fuel efficiency test can tell you what mpg to expect. Find out the top five most fuel efficient cars by class:
Our tests reveal that many car trip computers give inaccurate fuel economy readings. To discover your car’s true mpg, try using Which? Car fuel calculator.
It allows you to work out the amount of fuel you used on recent trips, and see exactly how much you ended up paying for single journeys.