Fuel efficiency, often measured in miles per gallon (MPG), is a crucial factor for car buyers looking to minimize running costs and reduce their environmental footprint. MPG indicates how far a car can travel on a single gallon of fuel, making it a key metric for comparing vehicle economy. While diesel engines have historically been known for their superior fuel economy, advancements in petrol and hybrid technology have significantly narrowed the gap, offering a wider range of choices for those seeking the Best Mpg Car. With petrol and hybrid vehicles gaining popularity, especially in markets like the UK, it’s essential to explore the top contenders in both categories to find the most fuel-efficient options available.
It’s important to remember that a car’s actual MPG can fluctuate based on individual driving habits. Aggressive acceleration and braking, for instance, can reduce fuel efficiency compared to smoother, more consistent driving. However, to provide a fair comparison, the following list of best MPG cars is based on official average fuel economy ratings determined by the Worldwide Harmonised Light-duty Vehicles Test Procedure (WLTP).
Here are some of the best MPG cars currently on the market, blending fuel savings with modern automotive technology:
- BMW 330e
- Toyota Prius
- Suzuki Swift
- Toyota Corolla Touring Sports
- Hyundai IONIQ
- Mercedes-Benz E300 de
- Peugeot 208
- Vauxhall Corsa
- Skoda Octavia
- Volkswagen Golf
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1. BMW 330e – 217.3 mpg
The BMW 330e proves that achieving excellent fuel economy doesn’t necessitate sacrificing driving pleasure. This plug-in hybrid combines a potent 2.0-litre petrol engine with an electric motor to deliver both brisk acceleration and remarkable MPG figures. It stands out as a compelling option in the plug-in hybrid segment, offering a seamless blend of performance and efficiency.
According to automotive expert Sam, “The 330e plug-in hybrid is often the most sought-after BMW 3 Series model, thanks to its electric-only driving range of approximately 30 miles and impressive fuel economy exceeding 100 mpg in real-world conditions.”
Inside, the 330e mirrors the renowned quality and technological sophistication of the broader BMW 3 Series range. For those considering a pre-owned option, the used BMW market offers attractive deals on various models.
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2. Toyota Prius – 67.0 mpg
Toyota’s Prius, a pioneer in hybrid technology, is available in both self-charging and plug-in hybrid variants. The plug-in version boasts an exceptional official MPG of 235.4, provided its battery is regularly charged. However, the self-charging Prius, which doesn’t require plugging in, presents a more budget-friendly option in the used car market while still delivering an impressive fuel economy of nearly 70 mpg, as reported by Toyota.
The plug-in hybrid Prius extends fuel efficiency further with its ability to operate solely on electric power for shorter commutes. Inside, the Prius upholds Toyota’s reputation for high build quality and comprehensive equipment levels across the range.
Sam notes the Prius’s widespread use as taxis, stating, “The Toyota Prius is a common sight as a taxi for good reason. Its exceptional reliability and low running costs make it a smart choice for high-mileage driving.”
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3. Suzuki Swift – 64.0 mpg
Every current Suzuki Swift model incorporates Suzuki’s ‘Boosterjet’ hybrid engine, a mild hybrid system where an electric motor assists the petrol engine, reducing its workload. This smart technology contributes to enhanced fuel efficiency in a compact package.
While the mild hybrid setup in the Swift doesn’t allow for pure electric driving, it significantly improves fuel economy compared to traditional petrol engines, while also offering a boost in acceleration performance. This makes the Swift a compelling choice for drivers seeking efficiency and a bit of driving zest.
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4. Toyota Corolla Touring Sports – 63.8 mpg
The Toyota Corolla, after a hiatus from the UK market, has made a strong comeback, particularly with its hybrid variants. The Touring Sports estate version, alongside the hatchback, offers a refined driving experience with well-tuned suspension and responsive handling. It’s a practical and enjoyable car that doesn’t compromise on fuel economy.
All Corolla versions come generously equipped, and buyers can choose between two petrol-hybrid engines – a 1.8-litre or a 2.0-litre – both delivering up to 63.8 mpg. This makes the Corolla Touring Sports a versatile and fuel-efficient choice in the estate car segment.
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5. Hyundai IONIQ – 60.0 mpg
Similar to the Toyota Prius, the Hyundai IONIQ is offered as a self-charging hybrid, but the plug-in hybrid variant presents even greater value, especially in the used car market. The IONIQ distinguishes itself with its focus on overall cost-effectiveness, extending beyond just fuel savings.
This Hyundai utilizes a 1.6-litre petrol engine paired with an electric motor, providing an electric-only range of up to 39 miles on a full charge. This electric capability significantly boosts its MPG, particularly for shorter journeys.
Sam highlights the broader financial advantages of the IONIQ, stating, “Beyond fuel savings, the Hyundai IONIQ also translates to lower insurance premiums and reduced maintenance expenses, making it a smart financial choice overall.”
The IONIQ is well-equipped as standard, offers a larger boot than the Prius, and maintains a strong official MPG rating, solidifying its place as a top MPG car.
The Most Fuel-Efficient Diesel Cars on Sale:
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1. Mercedes-Benz E300 de – 217.3 mpg
The Mercedes-Benz E300 de is a remarkable plug-in hybrid diesel, achieving an astonishing official MPG figure. This model demonstrates the potential of diesel technology when combined with electric power.
To achieve its claimed MPG, consistent battery charging is essential. Mercedes-Benz states that a fully charged battery provides the E300 de with approximately 33 miles of electric-only range, suitable for emission-free urban driving. This blend of diesel and electric power makes it a leader in fuel efficiency within the diesel category.
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2. Peugeot 208 1.5 Blue HDi – 71.4 mpg
Introduced in 2019, the Peugeot 208 diesel is a stylish supermini that combines eye-catching design with excellent fuel economy. It stands out in its class with its modern aesthetics and efficient diesel engine.
The five-door Peugeot 208 features distinctive LED lighting and a 1.5-litre diesel engine that officially achieves over 70 mpg. This impressive fuel efficiency makes it a cost-effective choice for city and longer distance driving. The interior is equally striking, featuring a unique dashboard layout with instruments viewed above the steering wheel, adding to its modern appeal.
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3. Vauxhall Corsa 1.5 Turbo D – 70.6 mpg
The Vauxhall Corsa shares its striking design language with the Peugeot 208, a result of both brands being part of the Stellantis group. This shared parentage extends beyond aesthetics to the underlying engineering as well.
Beneath the surface, the Vauxhall Corsa and Peugeot 208 share engines and other core components. Consequently, the Corsa’s fuel economy figures closely mirror the Peugeot’s, achieving over 70 mpg. This synergy makes the Corsa a strong contender in the fuel-efficient supermini category.
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4. Skoda Octavia 2.0 TDI SE – 68.9 mpg
The Skoda Octavia excels as a family car, offering generous interior space, particularly in the estate version with its notably large boot. This practicality is enhanced by exceptional fuel economy in certain models.
The 150hp 2.0-litre TDI engine in this Skoda Octavia variant prioritizes torque over outright power, enabling effortless motorway cruising in higher gears without frequent downshifts. This contributes significantly to its impressive MPG.
Sam emphasizes the Octavia’s renowned value proposition, noting, “The Skoda Octavia delivers outstanding fuel economy and class-leading reliability, all at a price point that remains accessible.”
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5. Volkswagen Golf 2.0 TDI – 68.9 mpg
Similar to the Peugeot-Vauxhall relationship, Skoda and Volkswagen share many mechanical components. This synergy is evident in models like the Golf and Octavia.
This version of the Mk8 Volkswagen Golf shares the same 150hp diesel engine and six-speed manual gearbox found in the Octavia. While the Golf offers slightly less interior space than the Octavia, it boasts a more premium cabin feel, featuring digital instruments and a large infotainment screen in most trims. The used VW market provides opportunities to find models like the Golf at attractive prices.
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Tips for Maximizing Fuel Efficiency
Choosing a fuel-efficient car is a great first step, but adopting fuel-conscious driving habits can further enhance your MPG and savings.
When selecting your next vehicle, prioritizing fuel efficiency is a sound decision for both your wallet and the environment.
The most fuel-efficient engine technologies include petrol engines with hybrid assistance and modern diesel engines, especially for longer journeys. However, even standard modern petrol engines are designed for efficiency, often incorporating turbochargers and hybrid technology.
Simple Changes for Better Fuel Consumption
You can significantly improve your car’s MPG by making a few adjustments to your driving style and car usage habits.
1) Reduce Air Conditioning Use
Switching off your air conditioning system is a simple yet effective way to conserve fuel. Air conditioning places a considerable load on the engine, as it powers more components than many drivers realize. Reducing its use, particularly when not strictly necessary, can lead to noticeable fuel savings.
2) Drive Smoothly
Adopting a smooth driving style is another key technique for improving fuel efficiency. Maintaining a steady speed and avoiding abrupt acceleration and braking minimizes fuel consumption.
For motorway driving, maintaining consistent revs and speed is crucial for optimal MPG. Similarly, gentle acceleration from a standstill reduces strain on the engine and saves fuel.
3) Combine Short Trips
Minimize short journeys where possible. Engines operate most efficiently once they reach their optimal operating temperature. Short trips often don’t allow the engine to fully warm up, leading to increased fuel consumption. Combining errands into a single trip allows the engine to reach and maintain its most efficient state, improving your overall MPG.
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