
When it comes to choosing a car that is suitable for motorway driving, fuel efficiency is a key consideration. While official fuel economy figures can be useful, they don't always reflect real-world driving conditions. However, there are several cars that stand out for their impressive fuel economy on the motorway. One option is the Toyota Prius, which offers 57/56/57 mpg and has been redesigned for the 2023 model year. The Hyundai Elantra Hybrid is another efficient choice, delivering 51/58/54 mpg, while the Kia Niro Hybrid provides 53/54/53 mpg. For those seeking a non-hybrid option, the Nissan Sentra is a good choice, with its 2.0-litre inline-four engine and CVT transmission. If you're looking for an affordable and efficient compact SUV, the Nissan Rogue is worth considering, offering 33 mpg combined in front-wheel-drive form. Lastly, the 2024 Honda Civic provides impressive fuel economy, with the mid-level EX rated at 33/42/36 mpg.
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What You'll Learn

The impact of driving style on fuel efficiency
Driving style has a significant impact on fuel efficiency, and this impact can vary depending on the driver's characteristics, the vehicle, and the driving conditions. Here are some key insights into how driving style affects fuel efficiency:
The Impact of Driving Behaviour
Aggressive driving behaviours, such as vigorous accelerations and decelerations, lead to increased fuel consumption and reduced efficiency of emission control systems. On the other hand, eco-driving, which emphasizes fuel efficiency, can lower fuel consumption and emissions. This includes techniques such as decelerating early, reducing highway speeds, and accelerating more gradually. These practices can lead to fuel savings of up to 6% per trip, with a slight increase in trip duration of about 1.5%.
Individual Driver Characteristics
Individual driver characteristics, such as age, gender, and driving experience, can also influence fuel efficiency. For example, during peak hours, female drivers tend to have lower fuel efficiency, while during off-peak hours, fuel efficiency is negatively correlated with commute frequency. Additionally, high-speed drivers who maintain higher average speeds and less speed variance tend to achieve better fuel efficiency.
Vehicle Choice and Technology
The choice of vehicle and its technology can also play a role in fuel efficiency. For example, electric vehicles (EVs) have different energy consumption patterns than traditional combustion engines, and accurate real-time energy consumption predictions are essential to mitigate range anxiety and encourage EV adoption. Some modern vehicles, like recent Mercedes-Benz models, provide aggregate eco-driving scores to help drivers improve their fuel efficiency.
Trip Characteristics
The nature of the trip itself can also impact fuel efficiency. Shorter trips may result in reduced efficiency as the engine doesn't have enough time to warm up, leading to higher fuel consumption. Additionally, weather anomalies and driving conditions can influence fuel efficiency, with smooth and steady driving generally being more fuel-efficient.
Car Choice and Fuel Efficiency
Different car models and engine types can have varying fuel efficiency ratings. For example, the 2024 Mitsubishi Mirage is known for its impressive fuel efficiency, with the hatchback model rated at 36/43/39 mpg (city/highway/combined). The Hyundai IONIQ, a self-charging or plug-in hybrid, offers cost-effectiveness and good fuel economy. The Toyota Prius, a well-known hybrid, boasts impressive fuel efficiency of 57/56/57 mpg.
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Electric cars vs. hybrids
Electric cars and hybrid vehicles have a lot of overlap but cater to different buyer needs. Electric vehicles (EVs) are powered by a battery that must be recharged, and they have at least one electric motor that drives the wheels. They have no tailpipe emissions, but the electricity used to charge them may come from a power plant burning fossil fuels. EVs have fewer moving parts, which means fewer breakdowns, but they can be expensive to repair. They also offer instant torque, resulting in brisk acceleration, and are quieter and smoother than internal-combustion engines.
Plug-in hybrid vehicles (PHEVs) have larger batteries than regular hybrids and can travel further using just electricity. They are a good option for those who want to transition to electric vehicles but are not yet ready to commit fully. They are also useful for those who don't have access to charging points, as they can use the engine until they find a charging station. Hybrids have smaller batteries and an internal-combustion engine, which decides whether to use the engine or the motor based on current conditions. They emit gases due to their internal-combustion engines, except for fuel cell electric vehicles (FCEVs), which use hydrogen instead of gasoline and have no tailpipe emissions. Hybrids are generally more expensive upfront than gasoline-powered cars, and their maintenance costs are higher due to the need to maintain both an electric system and an internal-combustion engine.
When it comes to motorway driving, it is essential to maintain steady revs and speed to maximise fuel economy. The 2024 Mitsubishi Mirage is currently the least thirsty gas-powered car, with the hatchback model rated at 36/43/39 mpg (city/highway/combined) and the sedan model rated at 35/41/37 mpg. The 2024 Honda Civic is another fuel-efficient option, with the mid-level EX model rated at 33/42/36 mpg.
Among hybrids, the 2023 Toyota Prius is a well-known option, offering 57/56/57 mpg. The 2024 Hyundai Elantra Hybrid is another efficient choice, with ratings of 51/58/54 mpg. The 2024 Kia Niro Plug-In Hybrid has an estimated average of 108 mpg-e and an electric-only range of 33 miles, making it a strong contender for motorway driving. The 2024 Ford Escape Plug-In Hybrid is also worth considering, with an estimated 101 mpg-e.
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The most fuel-efficient car models
When it comes to choosing a car that is fuel-efficient for motorway driving, there are several models that stand out. Firstly, the Toyota Prius, a well-known hybrid, offers excellent fuel economy, with an estimated 57/56/57 mpg. The Hyundai Elantra Hybrid is another impressive option, delivering 51/58/54 mpg. If you're looking for a non-hybrid, the Toyota Corolla is a reliable choice, with both the sedan and hatchback versions offering an EPA-estimated 35 mpg combined and 41 mpg on the highway.
For those seeking a more affordable option, the 2024 Mitsubishi Mirage is the most fuel-efficient and cost-effective gas-powered car on the market, starting at just under $18,000. The Mirage hatchback is the most fuel-efficient version, rated at 36/43/39 mpg city/highway/combined. Another cost-effective choice is the Hyundai IONIQ, which offers a larger boot than the Prius and excellent all-round cost-effectiveness, with lower fuel, insurance, and maintenance bills.
If you're open to electric vehicles, the BMW 330e plug-in hybrid is worth considering. It can run on pure electric power for around 30 miles and offers impressive fuel economy. The Kia Niro Plug-In Hybrid is another strong contender, with a manufacturer-estimated 108 mpg-e average and an electric-only range of 33 miles.
Lastly, for those who prefer non-hybrid SUVs, the Nissan Rogue is a good choice, offering an EPA-estimated 33 mpg combined in front-wheel-drive form. The 2024 Ford Escape Plug-In Hybrid is also an option, with a manufacturer-estimated 101 mpg-e.
It's important to remember that driving style and conditions can impact fuel economy, so be sure to test-drive these vehicles and consider your own driving habits when making a decision.
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The pros and cons of petrol vs. diesel cars
When deciding between a petrol or diesel car, it is important to consider your personal circumstances, including your budget, annual mileage, and typical daily journeys.
Petrol Cars
Petrol cars are generally cheaper to buy and fill up than diesel cars. They are also better suited to city driving and short journeys, as they are less expensive to run and perform well in stop-start traffic. They are also quieter and more refined, providing a smoother driving experience. However, they tend to use more fuel, especially on long journeys, and older models may be subject to higher road tax due to higher CO2 emissions.
Diesel Cars
Diesel cars tend to be more fuel-efficient, especially on long journeys and motorways, which can lead to lower overall running costs. They also produce more torque, making them better for towing or carrying heavy loads. However, they are typically more expensive to buy and service, and older models may have higher emissions, contributing to air pollution. Diesel particulate filters (DPFs) can also become blocked if used mainly for short journeys, leading to expensive repairs.
Environmental Considerations
While diesel cars have lower CO2 emissions, they produce tiny particles linked to breathing disorders such as asthma. Modern diesel engines often include particulate filters to reduce these emissions, but these can become clogged when used primarily for urban driving, leading to harmful gas emissions. Governments are starting to consider the impact of diesel cars on the environment, and some older models may not meet emission standards for low-emission zones.
Electric and Hybrid Vehicles
With advancements in technology, electric and hybrid vehicles are becoming increasingly popular. Electric cars are more environmentally friendly as they do not produce emissions while running, but they may face challenges with charging access on longer trips. Hybrid cars are extremely fuel-efficient, especially in urban areas where regular slowing and accelerating allow the batteries to recharge.
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Tips for improving fuel efficiency
Fuel prices are high, and driving more efficiently is better for both the environment and your wallet. Here are some tips to improve your car's fuel efficiency, especially when driving on the motorway:
Maintain Optimal Tyre Pressure
Check your tyre pressure regularly, especially before long journeys. Underinflated tyres can reduce fuel economy, cause greater tyre wear, and increase the chances of tyre blowouts. By keeping your tyres inflated to the recommended pressure, you can improve fuel efficiency and extend the life of your tyres.
Drive at Constant, Steady Speeds
Using cruise control on the motorway can help maintain a constant speed. Accelerating and braking gently and gradually, and reading the road ahead to anticipate hazards, can improve your vehicle's fuel economy. Avoid driving too fast or too slow, as pushing your engine harder will consume more fuel.
Avoid Excessive Revving
Keep your revs and speed as steady as possible. Avoid excessive revving of your accelerator to maintain lower Revolutions Per Minute (RPMs), which are more fuel-efficient. When slowing down or driving downhill, remaining in gear but taking your foot off the accelerator can be more efficient than "coasting" in neutral.
Plan Your Journeys
While it's not always possible to plan your route and avoid obstacles or congestion, stop-start trips and short trips are very fuel-inefficient. Your engine needs time to warm up, and if you're only driving short distances, it may never reach its optimal operating temperature, resulting in higher fuel consumption.
Choose a Fuel-Efficient Vehicle
If you're in the market for a new car, consider choosing a model known for its fuel efficiency. Hybrid and electric vehicles are increasingly cost-effective choices, with some hybrid models now available for under £15,000. The 2024 Mitsubishi Mirage, for instance, is the least thirsty gas-powered car sold today and is quite affordable. The 2024 Hyundai Elantra Hybrid and Kia Niro Hybrid are also excellent choices, offering impressive fuel economy.
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Frequently asked questions
The most fuel-efficient car for motorway driving depends on a variety of factors, including the driver's style, the car's engine, and the conditions of the road. However, here are some of the most fuel-efficient cars on the market:
- 2024 Honda Civic: Rated at 33/42/36 mpg
- 2024 Hyundai Elantra: Rated at 32/41/36 mpg
- 2024 Mitsubishi Mirage: Rated at 36/43/39 mpg
- 2023 Toyota Prius: Rated at 57/56/57 mpg
- 2024 Kia Niro Plug-In Hybrid: Rated at 108 mpg-e average
Here are some tips to improve fuel efficiency:
- Maintain a steady speed and avoid rapid acceleration or deceleration.
- Drive smoothly and avoid frequent gear changes.
- Avoid short trips as the engine needs time to warm up and reach optimal operating temperatures.
- Choose a car with a fuel-efficient engine and transmission, such as a hybrid or electric vehicle.
Choosing a fuel-efficient car for motorway driving has several advantages:
- Reduced fuel consumption and lower operating costs.
- Lower emissions, which is better for the environment.
- Improved engine performance and longevity due to reduced strain on the engine.
- More comfortable driving experience due to smoother acceleration and deceleration.

















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