UK’s Most Fuel-Efficient Cars 2022

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As fuel prices continue to rise, the average UK fill-up has gone past the £100 mark.

It’s proving to be a huge painpoint for many UK drivers, but one way to combat the rising cost of fuel is to look at cars that are more fuel-efficient.

Which cars are the best on fuel in 2022? We’re here to show you all the new cars that will get you a bargain at the pumps!


1. Mercedes-Benz C300e

Mercedes-Benz C Class
  • Fuel economy (combined): 470.8mpg
  • Electric range (WLTP): 67 miles
  • CO2 emissions: 13g/km
  • Charge time (7.4kW charger): Two hours

The plug-in hybrid version of the Mercedes-Benz C-Class, badged ‘C300e’, is the UK’s most fuel-efficient car, with an official combined fuel economy of 470.8mpg.

Of course, these figures will vary drastically depending on how you drive. However, even on longer journeys you’ll still see regular returns of 60-70mpg.

Since the C-Class 300e is a plug-in hybrid model, you’ll need to remember to charge its battery once this runs out of juice. The good news is that it has a large 25.4kWh unit that runs alongside a 2.1-litre petrol combustion engine, boosting efficiency and massively reducing emissions.

With a WLTP electric range of 67 miles, you’ll save lots of fuel on local commutes by travelling on electric power alone. There are also other cost-saving benefits to the C300e that transcend just fuel.

For company car drivers, for example, you’ll save plenty on tax thanks to the car’s incredibly low 13g/km CO2 emission stats.


Compare Mercedes C-Class C300e lease deals


2. Hyundai Ioniq PHEV

  • Fuel economy (combined): 260mpg
  • Electric range (WLTP): 39 miles
  • CO2 emissions: 26g/km
  • Charge time (7.4kW): Three hours

The Hyundai Ioniq PHEV is one of the most affordable plug-in hybrid cars money can buy, and it’s a similar savvy story when it comes to fuelling up.

Like the Mercedes before it, the Hyundai Ioniq PHEV uses a petrol engine that couples with a battery pack for added performance and efficiency. In this case, the combustion engine in question is a 1.6-litre petrol unit that’s the same as the one in the standard hybrid Ioniq. An 8.9kWh battery pack completes the setup and is capable of driving 39 miles (officially) between charges. In the real world, this is likely to be more like 30 miles, which is still good enough for most people not to need to use fuel while commuting locally.

As one of the best new brands for warranties, you’ll get an impressive five years/unlimited miles cover from the Hyundai Ioniq. This is one of the best out of its chief rivals, which is something you should consider as an extra bonus when considering your next car.


Compare Hyundai Ioniq lease deals


3. Toyota Corolla

Toyota Corolla pictured at night
  • Fuel economy (combined): 52-62.7mpg
  • CO2 emissions: 101-116g/km

Officially the world’s best-selling car – the Toyota Corolla is renowned for its savvy running costs and ease of ownership. This is down to the car being a self-charging hybrid which, as the name suggests, means that you don’t need to plug it in to keep it running.

You will be able to drive it in electric-only mode if you really feather the accelerator too. You can choose between a 1,8-litre engine with 120bhp or a larger 2.0-litre unit with 177bhp that feels punchier, albeit it’s less efficient at the pumps (52mpg versus 62.7mpg) and will be a bit more expensive on company car tax due to higher fuel emissions (116g/km vs 101g/km CO2)

Only the Volkswagen Golf is on a par with the Corolla’s level of comfort, thanks to its soft suspension setup which smoothes out the rough patches on the road.


Compare Toyota Corolla lease deals


4. Peugeot 208

Peugeot 208 driving
  • Fuel economy (combined): 47.9-69mpg
  • CO2 emissions: 104g/km

The Peugeot 208 is an award-winning hatchback with incredibly good running costs, a swanky tech-savvy ‘i-Cockpit’ cabin and a very fresh, sporty design.

With a fairly small 1.2-litre petrol engine, the 208 manages to keep fuel costs to a sensible level – namely a very frugal 47.9mpg. There’s also a diesel engine that’s even more savvy at the pumps (69mpg), though it’s slightly more expensive than the petrol model. It’s a great company car option, though, especially with its 79g/km CO2 emissions that mean it qualifies for some of the cheapest company car tax costs.


Compare Peugeot 208 lease deals


5. Toyota Yaris Cross

Toyota Yaris Cross driving
  • Fuel economy (combined): 60.1mpg
  • CO2 emissions: 117g/km

The Toyota Yaris Cross has been awarded the Small SUV of the Year title for 2022. It’s also one of the most fuel-efficient self-charging hybrid cars ever tested.

Overall, the Yaris Cross is bang on trend. Its SUV body promises plenty of space inside for the family, while it has the fuel-saving benefit of a small hybrid car and a lofty driving position that puts it on a par with the ever-popular Nissan Juke.


Compare Toyota Yaris Cross lease deals


6. Renault Clio

2020 New Renault CLIO E-TECH Hybrid
  • Fuel economy (combined): 54.4-64.2mpg
  • CO2 emissions: 118g/km

The Renault Clio is a hatchback classic. Across the years it’s been hailed for its cheap running costs, reliability and susprising levels of practicality that make it suited to being a small family car.

New Renault Clio models come with a 1.0-litre engine that’s not very flexible when it comes to power, but will be able to stretch its legs once you get going on an A-road. It’s also very cheap to fuel up, with a combined economy of around 54.5mpg on average.

We recommend looking at the punchier, more fuel-efficient E-Tech Hybrid version of the Renault Clio. With 143bhp under the bonnet from dual electric motors and support from a battery pack, this greener version of the Clio is a brilliant option for saving on fuel and getting a bit more ‘pizzazz’ from your family hatch.


Compare Renault Clio lease deals


7. Mazda 2

mazda 2 2022
  • Fuel economy (combined): 58.9-60mpg
  • CO2 emissions: 109g/km

If hybrid power isn’t really your thing and you want a good ol’ savvy petrol motor, then look no further than the Mazda 2. The standard 75bhp engine might not be the most exciting engine, but you’ll get 58.9mpg from it, making it one of the cheapest small cars to fuel up.

The good news is there’s a more powerful 90bhp versions that has even better fuel economy stats (60.1mpg combined).

Couple this with the Mazda 2’s famed good looks, generous standard kit and fun driving experience, and there’s not really much to grumble about here.


Compare Mazda 2 lease deals


Still considering your options and want a car that’s going to be cheap at the pumps? We compare hybrid lease deals on the latest, most fuel-efficient cars so that you can save money filling up your car.


Compare hybrid lease deals


Want to keep up to date with the latest car news, reviews and entertainment? Head over to the Moneyshake blog for more.