Fuel efficiency has progressed massively over recent years as technology has improved and cars have become cleaner and greener. These days, it isn’t just smaller cars that offer the best fuel economy – you’ll find it in bigger models too. Hybrid power has played a significant role in this, as electrical assistance works wonders to extract the most miles from as little fuel as possible.

So, if you want a car that puts fuel efficiency to the top of its priority list then read on – we’ve got some big-hitters to check out.

There are plenty of economical cars available in the used market, providing options for all types of drivers. We’re going to be checking out a variety of petrol-powered fuel efficient cars in this article, so let’s check them out.

1. Kia Niro - (2016-2022) - 58.9mpg

Kia took a three-pronged approach when it launched the Niro, releasing it with electric, plug-in hybrid and ‘regular’ hybrid setups so that it could suit all types of drivers. While the plug-in hybrid does grab the headlines with its consumption figures, we’re still very impressed by the 58.9mpg you can get from the standard hybrid – and it’s a great pick if you’ve not the option of charging up at home.

Inside, you’ll find a well-made cabin with lots of standard equipment while the boxy design means it’s got more headroom to offer those sitting in the back than you might expect. Plus, Kia offers a seven-year warranty on its cars, so you might be able to get a late-model Niro with some of this cover intact – it’s transferrable between owners.

Best Features

  • Great efficiency from a ‘standard’ hybrid.
  • Roomy interior feels built to last.
  • Transferrable warranty adds extra peace-of-mind.
  • Things to consider

    • Lots of grey plastic means the interior can feel dull.
    • Exterior is quite nondescript – it’s not one for extroverts.
    • Can feel quite firm at low speeds.

    2. Toyota Prius - (2016-2022) 235mpg

    The Prius is a car which people often think about first when efficiency is mentioned. It’s often seen as the ‘first’ hybrid and one which kickstarted the electrically assisted car boom. This generation of Prius wasn’t just available as a ‘regular’ hybrid, either, but as a full-fat plug-in hybrid that can return up to 235mpg.

    As with all plug-in hybrids, this generation of Prius needs to be charged up to be at its most efficient, so you’re going to have to think about how you’re able to top it up before diving into a purchase. However, if that works for you, then the Prius offers a comfortable and quiet driving experience.

    Best Features

  • Brilliantly efficient.
  • Has a superb track record for efficiency.
  • Lots of equipment to play with inside.
  • Things to consider

    • Will require charging provision.
    • Prius models are often high-mileage due to popularity with taxi drivers and private hire firms.
    • Gearbox and engine can be loud when accelerating hard.

    3. Suzuki Swift - (2010-2017) 56.5mpg

    If a no-nonsense but efficient car is what you’re after, then look no further than the Suzuki Swift. Suzuki has excellent form in producing small, clean and easy-to-maintain models and the Swift is a prime example of this. We’re big fans of this second-generation Swift, too, as it’s a very inexpensive option that is commonplace on the used market, while parts are in excellent supply as well.

    The 1.2-litre petrol engine in the most efficient Swift is surprisingly peppy for such a small-capacity unit and while this Suzuki is definitely most at home around town, it remains composed enough on the motorway to ensure that longer trips aren’t a slog.

    Best Features

    • The Swift is a great option for drivers on a budget.
    • Lots of availability in the used market.
    • Cheap to run, repair and insure – it’s a great low-cost package.

    Things to interior

    • Interior plastics do feel cheap.
    • Boot isn’t the largest while the cabin itself isn’t that roomy.
    • Automatic versions diminish performance and reduce efficiency.

    4. Ford Fiesta - 1.0 litre EcoBoost (2017-2023) 50.4mpg

    When it comes to the best MPG cars, the Ford Fiesta is a car which consistently comes out on top. Sure, it doesn’t have the massive headline-grabbing figures of a plug-in hybrid, but the Fiesta’s over-50mpg is a figure that makes a big impact on a day-to-day basis and it’s one that can be achieved without having to drive too carefully.

    The Fiesta’s sharp and nimble handling is what makes this car feel so good to drive, while the peppy response of the 1.0-litre EcoBoost engine adds some character to it all, too. Inside, you’ve got a well-made cabin with lots of features while the boot isn’t as small as you might expect for a car of this size.

    Best Features

  • Lots of availability in the used market.
  • Good variety of specifications and colours to choose from.
  • Great to drive, whether that’s around town or at higher speeds.
  • Things to consider

    • Rear-seat space is pretty tight.
    • Some of the interior plastics feel a bit cheap.
    • Infotainment system can be a bit fiddly to use.

    5. Mitsubishi Outlander - (2014-2021) 139.7mpg

    The Outlander was one of the cars which kicked off the plug-in hybrid revolution. Here was a car which delivered the same space and practicality as a ‘regular’ SUV, but could be powered for a fraction of the cost – providing it was charged up, of course.

    While the Outlander may not feel quite as pioneering today as it did when it was launched back in 2014, it’s still a great option for drivers who want space and efficiency. All models come equipped with plenty of equipment while the Outlander’s reliability has always been impressive, which adds another string to its bow.

    Best Features

    • Possibility of very low running costs.
    • Spacious interior is great for families.
    • All versions come loaded with equipment.

    Things to consider

    • The plug-in hybrid Outlander misses out on the seven seats of the ‘regular’ version – it’s strictly five-seats.
    • Will need to be plugged in regularly in order to get the best possible efficiency.
    • Technology inside has started to feel dated.

    6. Fiat 500 - (2008-present) - 52.3mpg

    The Fiat 500 isn’t just a great small car, it’s also one of the best fuel-efficient cars out there. With its compact proportions and light steering it’s superb to drive around town, while its compact engines deliver some excellent fuel consumption figures with the clever TwinAir unit being particularly frugal.

    You’re also getting a healthy dose of style with the 500 thanks to its smart exterior design and cleverly packaged interior. Of course, those after a very spacious car should look elsewhere, but if you’re after a car that’ll be easy to park and easy on the finances to run, then the Fiat 500 should certainly be on your list.

    Best Features

  • The 500 is excellent to drive around town, but handles longer journeys well too.
  • Smart styling continues to stand out from the crowd, even today.
  • Interior has a cool look to it that makes things interesting.
  • Things to consider

    • Some interior materials aren’t the best.
    • The 500’s reliability has been questionable at points.
    • Facelift was introduced in 2016 – look out for models after this if you’re wanting upgraded tech and a sharper look.

    7. Toyota Auris - (2013-2019) - 70.6mpg

    Toyota has fine form when it comes to fuel-efficient cars and, of course, was the maker of the iconic Prius which we’ve also featured in this list. It’s got the same great reliability track-record as the Prius, too, and while the Auris might not be the most exciting of cars it’s superb when it comes to efficiency and ease-of-use.

    You’ll find plenty of toys onboard the Auris, too, with all cars getting features such as climate control from the off. While there are ‘regular’ petrol versions of the Auris available too, we’d be focusing on the excellent hybrid setup if you’re after the best-possible fuel economy.

    Best Features

    • Plenty of equipment on-board all models.
    • Excellent reliability record.
    • Low running costs overall.

    Things to consider

    • Lots of grey plastics make the interior quite dull.
    • Hybrid powertrain can be quite noisy under heavy acceleration.
    • Boot space isn’t as good as you might expect for a car of this size.

    8. Peugeot 508 - (2018-present) - 235.4mpg

    The latest generation of Peugeot 508 is arguably one of the French firm’s most striking models to date, so if you’re after a new vehicle with plenty of style, you’ve come to the right place.

    But along with those head-turning looks, the 508 also features a super-clean plug-in hybrid engine setup which can deliver up to 235.4mpg – though it’ll need to be fully charged in order to achieve this. Elsewhere, we’ve got a pleasantly made interior with lots of clever tech while the option of either hatchback or estate layouts gives plenty of options. In a change to other Peugeots, the 508 has a sportier suspension setup which does make things firmer, but means that it corners pleasantly.

    Best Features

  • Eye-catching design helps the 508 to stand out.
  • Plenty of equipment inside makes the 508 a great option for keen button-pressers.
  • The 508 is quiet and refined at speed – it’s a great long-distance cruiser.
  • Things to consider

    • The 508 will need to be regularly charged to get the best efficiency – so you’ll need somewhere to plug in.
    • Striking design does mean that rearward visibility isn’t the best.
    • Rear-seat headroom isn’t great due to sloping roofline.

    9. Mini Hatch - (2014-2024) - 60.1mpg

    The Mini Hatch is a car that offers it all – great looks, an excellent driving experience and – importantly for this list – good efficiency as well. We’ve always loved the Mini Hatch for its character, but it’s also got excellent levels of build quality which ensures that even older models still feel solid today.

    This third-generation Mini Hatch introduced more spaciousness than before – but it’s still by no means an SUV – while the 1.5-litre petrol-powered Cooper is the one to pick if you’re after the best possible fuel economy. It’s also just as powerful as you’d need in a car like this and, when combined with the Mini’s great dynamics, provide a car that can inspire a grin, even on the most mundane of drives.

    Best Features

    • Brilliant handling which makes the Mini great fun to drive.
    • Interior is built to last with solid materials.
    • Easy to live with in town thanks to its compact size.

    Things to consider

    • Not the most spacious, both in the cabin and the boot.
    • Ride can be quite firm – particularly on versions with bigger wheels.
    • Variety of equipment ‘packs’ can make choosing confusing.

    10. Volkswagen Up! - (2021-2023) 55.4

    We finish with a true Motors favourite – the Volkswagen Up! It’s a car which packs a lot into a small footprint, with this car’s boxy dimensions making it a far better option for taller drivers and passengers than you’d expect.

    It’s also remarkably well packaged, meaning that there’s a lot more boot space than you’d get from an equivalently car. However, most importantly for this list, the Up! is also brilliantly efficient, with its 1.0-litre engine delivering excellent fuel economy alongside enough performance to get this compact car up to speed in good enough time. Bear in mind – the Up! does hold its value, so expect to pay a slight premium for a decent example.

    Best Features

  • Feels far larger to live with than its dimensions suggest – the Up! is really spacious inside.
  • Build quality is excellent with lots of solid materials.
  • Three- and five-door layouts available.
  • Things to consider

    • Up! models do carry a premium and can cost more than equivalent models.
    • Automatic gearbox is poor – the manual is a better choice.
    • Basic specification cars don’t get a lot in the way of equipment.

    What to look for when buying a used fuel efficient car

    There are lots of factors to bear in mind when you’re looking at a used fuel efficient car. Over time, cars do lose their efficiency, so higher-mileage models may not deliver the same kind of fuel economy as a nearly-new version. However, with good maintenance the drop-off shouldn’t be too bad, so make sure that you’re getting a car with an extensive service history if you’re looking at an example with more miles on the clock.

    If you’re on a budget, then remember that fuel efficiency isn’t the only money-saving factor – it’s worth checking how much a car you’re looking at will cost to insure, alongside typical repair, tax and tyres costs.

    What improves a car’s fuel economy?

    There’s a lot that impacts how fuel-efficient a car is. Servicing is a big part of this, as a poorly looked-after car will have an engine which isn’t running at its most efficient. Regular oil changes can ensure that a car is operating as smoothly as possible, which in turn will help it to deliver the best-possible efficiency.

    Tyres also impact how much fuel a car is using. Under-inflated tyres can drastically alter a car’s fuel consumption, so make sure that they’re always topped up to the correct levels.

    You driving style also changes how efficient a car is. Being heavy with the accelerator will quickly cause your fuel efficiency to drop, whereas being smooth with the throttle and letting off the power when approaching the brow of a hill – and coasting down the other side – can really help.