When you’re trying to figure out a car’s fuel efficiency, the key metric is Miles Per Gallon, or MPG. This tells you exactly how many miles a car can travel on one gallon of fuel – roughly 4.5 liters. The range can be quite dramatic, from a mere 11 MPG at the lower end to some truly impressive figures on the higher end.
Historically, diesel cars have been the champions of fuel economy, outperforming their petrol counterparts. However, with the increasing popularity of petrol and hybrid vehicles among drivers, we’re seeing a shift. This guide will explore the best cars for MPG in both the petrol and hybrid categories, starting with petrol options.
It’s important to remember that MPG figures can fluctuate based on driving habits. A more aggressive driving style will generally lead to lower fuel economy compared to a smoother, more conservative approach.
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For consistency, the MPG figures listed below are the official average fuel economy ratings, determined by the Worldwide Harmonised Light-Duty Vehicles Test Procedure (WLTP).
Here are 10 of the most fuel-efficient cars currently available, achieving the best MPG:
- 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 mean sacrificing driving pleasure. This plug-in hybrid combines a 2.0-liter petrol engine with an electric motor, delivering both strong performance and remarkable MPG. For drivers seeking a car with the best MPG that still offers a premium experience, the 330e is a strong contender.
According to automotive experts, the 330e plug-in hybrid stands out in the BMW 3 Series lineup due to its capability to run solely on electric power for approximately 30 miles and achieve well over 100 MPG on paper. In real-world driving, expect to see figures closer to the official 217.3 MPG when utilizing the hybrid system effectively.
Like other models in the BMW 3 Series, the interior of the 330e is refined and packed with advanced technology. For those considering a used option, there are attractive deals available on used BMW models, making this fuel-efficient car even more accessible.
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2. Toyota Prius – 67.0 MPG
Toyota offers both self-charging hybrid and plug-in hybrid versions of the Prius. While the plug-in version boasts an impressive official MPG of 235.4, this is highly dependent on consistent battery charging. For a car that consistently delivers excellent MPG without needing to be plugged in, the self-charging Toyota Prius is an excellent choice.
The self-charging Prius, which doesn’t require external charging, is often more affordable on the used car market. It still provides exceptional fuel economy, nearing 70 MPG according to Toyota’s figures. This makes it a practical and economical choice for drivers prioritizing fuel efficiency.
Plug-in hybrid Prius models offer the advantage of electric-only driving for shorter trips, further enhancing fuel savings when used appropriately. Inside, the Prius is well-equipped, typical of Toyota’s commitment to high standards and reliable construction.
Industry experts note the Toyota Prius’s popularity as a taxi, highlighting its reliability and low running costs. These attributes make it a smart choice for anyone looking for a car with the best MPG and long-term dependability.
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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 designed to enhance fuel efficiency. This setup uses an electric motor to reduce the load on the petrol engine, contributing to better MPG. The Suzuki Swift is a great example of a compact car with excellent MPG.
While the mild hybrid system doesn’t allow for pure electric driving, it significantly improves fuel economy compared to traditional petrol engines. Drivers benefit from improved MPG and a little extra power during acceleration. This combination makes the Swift a fun and frugal option in the supermini category.
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4. Toyota Corolla Touring Sports – 63.8 MPG
The Toyota Corolla has made a successful return, now offering hybrid technology for enhanced fuel efficiency. Both the estate (Touring Sports) and hatchback versions of the Corolla are enjoyable to drive, offering well-balanced suspension and responsive handling. For those needing more space without sacrificing MPG, the Corolla Touring Sports is an excellent option.
All Corolla models are well-equipped and offer a choice between two petrol-hybrid engines: a 1.8-liter and a 2.0-liter. Both options deliver impressive MPG figures, with the most economical versions achieving up to 63.8 MPG. This combination of practicality, driving dynamics, and fuel efficiency makes the Corolla a compelling choice.
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5. Hyundai IONIQ – 60.0 MPG
Similar to the Toyota Prius, the Hyundai IONIQ is available as both a self-charging hybrid and a plug-in hybrid. In the used car market, the plug-in hybrid IONIQ often presents better value. The Hyundai IONIQ stands out as a very cost-effective car with great MPG.
Powering the IONIQ is a 1.6-liter petrol engine paired with an electric motor, offering an electric-only range of up to 39 miles on a full charge. This electric range, combined with the petrol engine, contributes to its excellent overall MPG.
Experts emphasize the IONIQ’s overall cost-effectiveness, noting that beyond fuel savings, owners can expect lower insurance and maintenance expenses. The IONIQ also boasts a generous list of standard features and a larger boot than the Prius. While its official MPG might be slightly less than the Prius, it remains a highly fuel-efficient and practical car.
The Most Fuel-Efficient Diesel Cars for Maximum MPG:
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1. Mercedes-Benz E300 de – 217.3 MPG
The Mercedes-Benz E300 de is a plug-in hybrid diesel that achieves an astonishing official MPG figure, making it a leader in fuel economy. For those prioritizing the absolute best MPG and who prefer diesel power, the E300 de is a standout choice.
To achieve its claimed MPG, regular battery charging is essential. With a fully charged battery, Mercedes-Benz states the E300 de can travel up to 33 miles on electric power alone, sufficient for navigating urban environments or shorter commutes. This electric range, combined with the diesel engine’s inherent efficiency, leads to exceptional overall fuel economy.
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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 impressive fuel efficiency. The Peugeot 208 diesel is a visually appealing car with excellent MPG in the supermini category.
Equipped with five doors, distinctive LED lighting, and a 1.5-liter diesel engine, the Peugeot 208 officially returns over 70 MPG. This makes it one of the most fuel-efficient non-hybrid cars available.
The interior of the Peugeot 208 is equally striking, featuring a modern dashboard design with instruments positioned above the steering wheel for a unique driver experience.
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3. Vauxhall Corsa 1.5 Turbo D – 70.6 MPG
The visual similarities between the Vauxhall Corsa and Peugeot 208 are not coincidental; both brands are part of the Stellantis group. The Vauxhall Corsa diesel mirrors the Peugeot 208 in offering fantastic MPG in a compact form.
Beneath the surface, the Corsa and 208 share many components, including the engine and other mechanical elements. This shared engineering explains the Corsa’s very similar fuel economy figures, placing it among the top cars for MPG in its class.
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4. Skoda Octavia 2.0 TDI SE – 68.9 MPG
The Skoda Octavia is a highly regarded family car known for its spacious interior, particularly the Estate model with its large boot. The Skoda Octavia diesel combines practicality with impressive MPG for family car buyers. This version enhances its appeal with exceptional fuel economy.
Powered by a 150hp 2.0-liter TDI engine, the Octavia offers ample torque, allowing for relaxed motorway cruising in top gear without frequent gear changes. While not the most powerful engine, it prioritizes efficiency and smooth driving.
Experts appreciate the Octavia’s reputation for value for money, emphasizing its combination of incredible fuel economy and class-leading reliability at an accessible price point.
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5. Volkswagen Golf 2.0 TDI – 68.9 MPG
Similar to the Peugeot-Vauxhall relationship, Skoda and Volkswagen share many underlying components. The Volkswagen Golf diesel offers a blend of premium feel and excellent MPG, sharing its efficient engine with the Skoda Octavia.
This Mk8 Golf variant utilizes the same 150hp diesel engine and six-speed manual gearbox as the Octavia. While the Golf offers a more premium interior feel, especially with digital instruments and a large infotainment screen in many versions, it is slightly less spacious than the Octavia. Used VW Golf models are often available at attractive prices, making this fuel-efficient car even more appealing.
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How to Maximize Your Car’s MPG
Choosing a fuel-efficient car is a great first step, but optimizing your driving habits can further improve your MPG. Selecting a car with the best MPG is important, and so are driving habits.
Opting for a car that is as fuel-efficient as possible is always a wise decision. This not only reduces your fuel expenses but also contributes to environmental conservation. Modern cars offer various engine technologies, with petrol engines supported by hybrid systems and newer diesel engines generally providing the best fuel economy, especially on longer journeys. However, even standard modern petrol engines are designed for efficiency, thanks to advancements like turbochargers and hybrid technology integration.
Simple Changes to Save on Fuel Consumption and Improve MPG
Adopting a few adjustments to your driving style can significantly enhance your car’s fuel efficiency and MPG.
1) Reduce Air Conditioning Usage
Turning off your car’s air conditioning system is a straightforward way to save fuel. Reducing AC use is a simple tip to boost your car’s MPG. Air conditioning places a considerable load on the engine, consuming more fuel than many drivers realize. By using it judiciously, especially at lower speeds or when the outside temperature is mild, you can improve your MPG.
2) Drive Smoothly and Steadily
Adopting a smooth driving style is another effective method to minimize fuel consumption. Smooth driving habits are key to maximizing MPG. On motorways, maintaining a constant speed and keeping engine revs low are crucial for optimal fuel economy. Similarly, gentle acceleration from a standstill reduces strain on the engine and improves MPG. Avoid harsh braking and sudden acceleration for better fuel efficiency.
3) Combine Short Trips
Minimize very short journeys where possible. Combining short trips can help improve your car’s overall MPG. Engines operate most efficiently when they are warmed up. Short trips prevent the engine from reaching its optimal operating temperature, leading to increased fuel consumption. By combining errands into a single trip, you allow the engine to warm up fully, improving fuel efficiency and MPG.
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