In today’s world, where fuel costs are a significant concern for drivers, understanding and maximizing fuel efficiency is more important than ever. When we talk about fuel efficiency, the term that comes to mind is Miles Per Gallon, or MPG. This metric tells you exactly how far your car can travel on a single gallon of fuel, approximately 4.5 liters. The range can vary dramatically, from as low as 11 miles to much higher figures, which we will explore.
Historically, diesel engines have been lauded for their superior fuel economy compared to their petrol counterparts. However, with evolving preferences towards petrol and hybrid vehicles, especially in markets like the UK, it’s essential to consider the most fuel-efficient options across both categories.
Before diving into specific models, it’s crucial to acknowledge that real-world MPG can fluctuate based on driving habits. A more aggressive driving style will naturally consume more fuel than a gentle, steady approach. For the sake of comparison, the cars listed below are ranked according to their official average fuel economy ratings, determined by the Worldwide Harmonised Light-duty Vehicles Test Procedure (WLTP), providing a standardized benchmark.
Here’s a curated list of some of the most fuel-efficient cars currently available, spanning both petrol hybrid and diesel technologies.
- 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 – Achieving an Astonishing 217.3 MPG
The BMW 330e stands out as a prime example that fuel-efficient hybrid cars can be both economical and exhilarating to drive. This plug-in hybrid model combines a potent 2.0-liter petrol engine with an electric motor, resulting in brisk acceleration and remarkably low fuel consumption.
According to Sam, a seasoned motoring editor, “The 330e plug-in hybrid variant of the BMW 3 Series often steals the spotlight, primarily because of its ability to operate solely on electric power for approximately 30 miles and achieve well over 100 MPG in ideal conditions.”
Beyond its fuel efficiency, the 330e mirrors the renowned quality and technological sophistication found across the BMW 3 Series range. For those considering a premium option, the used market offers attractive deals on BMW models.
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2. Toyota Prius – Exceptional MPG at 67.0
Toyota’s Prius is synonymous with hybrid technology, offering both self-charging hybrid and plug-in hybrid versions. While the plug-in variant boasts an incredible official MPG of 235.4 – contingent on regular battery charging – the self-charging Prius remains a highly economical choice.
The self-charging Toyota Prius, which forgoes the need for plugging in, is often more budget-friendly in the used car market and still delivers close to 70 MPG, as reported by Toyota. Plug-in Prius models extend their electric-only range for shorter commutes, enhancing fuel savings.
Inside, the Prius is characteristically well-appointed, reflecting Toyota’s commitment to high build quality and comprehensive features across its range.
Sam notes, “The Toyota Prius is a common sight as a taxi, and for good reason. It’s renowned for its exceptional reliability and low running costs, making it a smart choice for economical transportation.”
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3. Suzuki Swift – Impressive Fuel Efficiency at 64.0 MPG
Every iteration of the Suzuki Swift supermini currently available incorporates Suzuki’s ‘Boosterjet’ hybrid engine technology. This mild hybrid system uses an electric motor to lessen the load on the petrol engine, improving overall efficiency.
Although the mild hybrid setup in the Suzuki Swift doesn’t allow for pure electric driving, it enhances fuel economy beyond that of a conventional petrol engine, while also providing a boost in acceleration. This makes the Swift a practical and economical option in the supermini category.
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4. Toyota Corolla Touring Sports – Practicality Meets Economy at 63.8 MPG
The Toyota Corolla has made a successful return, now offering hybrid technology that enhances both performance and fuel economy. The Touring Sports variant, an estate model, along with the hatchback, are noted for their enjoyable driving dynamics, featuring well-tuned suspension and responsive handling.
Each Corolla model is generously equipped and offers a choice between a 1.8-liter or a 2.0-liter petrol-hybrid engine, both delivering up to 63.8 MPG. This combination of practicality and efficiency makes the Corolla Touring Sports a compelling choice for families and individuals alike.
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5. Hyundai IONIQ – Cost-Effective Efficiency at 60.0 MPG
Mirroring the Toyota Prius, the Hyundai IONIQ is available in both self-charging hybrid and plug-in hybrid versions. The plug-in hybrid IONIQ often presents better value as a used vehicle, offering substantial fuel savings.
Powering the Hyundai IONIQ is a 1.6-liter petrol engine paired with an electric motor, enabling an electric-only range of up to 39 miles on a full charge. This plug-in capability significantly reduces fuel consumption for daily commutes.
Sam highlights the IONIQ’s overall cost-effectiveness, stating, “Beyond just fuel savings, the IONIQ is also likely to offer lower insurance premiums and reduced maintenance expenses, contributing to long-term savings.”
The IONIQ is well-equipped, offers a larger boot space than the Prius, and maintains a strong official MPG rating, making it a highly practical and economical car.
The Most Fuel-Efficient Diesel Cars Available:
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1. Mercedes-Benz E300 de – Unbelievable 217.3 MPG
It’s not an error – the Mercedes-Benz E300 de is indeed a plug-in hybrid diesel, boasting an astonishing official MPG figure. This model is engineered for maximum mileage, especially when utilizing its hybrid capabilities.
To achieve this remarkable fuel economy, consistent battery charging is essential. Mercedes-Benz claims that with a full battery, the E300 de can travel up to 33 miles on electric power alone, making daily commutes within urban areas highly efficient and potentially emission-free.
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2. Peugeot 208 1.5 Blue HDi – Stylish and Economical at 71.4 MPG
Introduced in 2019, the Peugeot 208 diesel hybrid is a visually appealing supermini that doesn’t compromise on fuel efficiency. This five-door model features distinctive LED lighting and a 1.5-liter diesel engine capable of achieving over 70 MPG officially.
The Peugeot 208’s interior is equally striking, characterized by a modern dashboard design where the instrument panel is positioned above the steering wheel, offering a unique and ergonomic driving experience.
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3. Vauxhall Corsa 1.5 Turbo D – Familiar Looks, Excellent MPG at 70.6
The visual similarities between the Vauxhall Corsa and Peugeot 208 are no coincidence, as both brands operate under the Stellantis group. This collaboration extends beneath the surface, with the Vauxhall Corsa sharing the Peugeot’s engine and core components, resulting in comparable fuel economy figures.
The Vauxhall Corsa offers a blend of style and efficiency, making it a solid contender in the supermini segment, particularly for those prioritizing fuel savings.
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4. Skoda Octavia 2.0 TDI SE – Spacious and Economical Family Car at 68.9 MPG
The Skoda Octavia is recognized as an excellent family car across its range, thanks to its generous interior space, especially the expansive boot in the Estate model. The 2.0 TDI SE version enhances this practicality with outstanding fuel economy.
Equipped with a 150hp 2.0-liter TDI engine, the Skoda Octavia is not only fuel-efficient but also offers ample torque for relaxed motorway driving, minimizing the need for frequent gear changes.
Sam praises the Octavia for its value proposition, noting, “The Octavia provides incredible fuel economy and class-leading reliability, all at a price point that is accessible, making it a smart choice for budget-conscious families.”
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5. Volkswagen Golf 2.0 TDI – Premium Feel with Great MPG at 68.9
Similar to the Peugeot-Vauxhall relationship, Skoda and Volkswagen share many underlying components. This Volkswagen Golf Mk8 variant utilizes the same 150hp diesel engine and six-speed manual gearbox as the Octavia, resulting in identical MPG figures.
While slightly less spacious than the Octavia, the Golf offers a more premium interior ambiance, featuring digital instruments and a large infotainment screen in most trims. The used market presents attractive opportunities to acquire Volkswagen Golf models at competitive prices.
Maximizing Your MPG: Driving Habits Matter
Choosing a fuel-efficient car is a great first step, but optimizing your driving habits can further enhance your MPG and save you money at the pump. Fuel-efficient driving not only benefits your wallet but also reduces your environmental footprint. Modern cars, whether petrol or diesel, often incorporate turbochargers and hybrid technologies to improve efficiency.
Simple Changes for Better Fuel Consumption:
1) Reduce Air Conditioning Use
Turning off your car’s air conditioning system is a straightforward way to save fuel. Air conditioning places an additional load on the engine, consuming more power than many drivers realize. Using ventilation or opening windows when possible can significantly reduce fuel consumption.
2) Drive Smoothly and Steadily
Adopting a smooth driving style is crucial for fuel efficiency. On highways, maintaining a constant speed and keeping engine revolutions low maximizes fuel economy. Similarly, gentle acceleration from a standstill minimizes strain on the engine and reduces fuel wastage. Avoid harsh braking and rapid acceleration to become a more ‘smooth operator’ behind the wheel.
3) Combine Short Trips
Whenever feasible, consolidate short journeys. Engines operate most efficiently once they reach their optimal operating temperature. Short trips prevent the engine from fully warming up, leading to increased fuel consumption as the engine operates less efficiently when cold. Combining errands into a single trip allows the engine to reach and maintain its most efficient state for longer durations.
By selecting a car with a high MPG rating and implementing these driving tips, you can significantly reduce your fuel costs and contribute to a more sustainable driving future. Consider fuel efficiency as a key factor in your next car purchase to enjoy long-term savings and environmental benefits.
