Sylvie Willis
There are several ways to save fuel when driving an automatic car. One of the most important tips is to avoid aggressive driving behaviours such as rapid acceleration, speeding, and hard braking, which can lower fuel efficiency by up to 33% on highways. Instead, drive smoothly and gradually by anticipating the road and traffic ahead. This includes maintaining a steady speed, avoiding sudden stops, and using cruise control when possible. Additionally, proper vehicle maintenance, such as ensuring correct tyre pressure and regular wheel alignments, can also improve fuel efficiency. Other tips include removing unnecessary weight from the vehicle, using air conditioning sparingly, and planning your route to avoid stop-start traffic.
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What You'll Learn
Avoid aggressive driving, accelerating gently and pulling away slowly
Aggressive driving can significantly impact fuel economy. The US Environmental Protection Agency notes that aggressive driving can lower your fuel consumption by 33% at highway speeds and by 5% around town. Therefore, it is essential to avoid aggressive driving behaviours such as speeding, accelerating or braking aggressively, and taking circuitous routes.
One way to improve fuel efficiency is to accelerate gently. Instead of making sudden, jerky movements when pressing down on the gas pedal, gradually increase your speed. This can be achieved by slowly applying pressure to the gas pedal until you reach your desired cruising speed. By doing so, you will avoid placing an unnecessary burden on the engine and transmission, which can impact fuel economy.
Similarly, pulling away slowly is another fuel-saving technique. When starting from a stopped position, especially on a steep incline, you can gently increase your speed without accelerating too quickly. This will help you conserve fuel and improve your overall fuel efficiency.
Additionally, it is beneficial to anticipate stopping and slowly ease off the accelerator to slow down, rather than coming to a sudden stop. By reducing the need for hard braking, you will improve your fuel economy and promote safer driving.
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Use air-con wisely, rolling windows down at lower speeds
When it comes to saving fuel in an automatic car, one of the most hotly debated topics is whether to use air conditioning or roll the windows down. The general consensus is that using air conditioning can increase fuel consumption, but that rolling the windows down also creates air resistance, particularly at high speeds, which in turn reduces fuel efficiency. So, what's the solution?
Well, it depends on the speed at which you're driving. Most sources agree that driving with the windows down is the most fuel-efficient option at lower speeds. This is because, at lower speeds, your engine is producing less power, so it would have to work much harder to power accessories like the air compressor for the air conditioning. By rolling the windows down instead, you eliminate the need for the air compressor, reducing the load on your engine and improving fuel economy.
However, as speed increases, so does air resistance, which can significantly impact fuel efficiency. A study by the Society of Automotive Engineers (SAE) found that open windows reduce gas efficiency by 20% at 55 mph. Therefore, it is recommended to switch off the air conditioning and roll down the windows at lower speeds (generally considered to be below 40-45 mph) and use the air conditioning when driving at higher speeds.
It's worth noting that the impact of air conditioning on fuel economy may vary depending on various factors, including vehicle shape, engine size, and compressor efficiency. Additionally, when stuck in bumper-to-bumper traffic, it is recommended to avoid using air conditioning or opening the windows due to the increased exposure to air pollution. Instead, you can try alternative methods to keep your car cool, such as parking in the shade or using tinted windows or a fan.
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Maintain correct tyre pressure to reduce rolling resistance
Maintaining the correct tyre pressure is essential to reducing rolling resistance and improving fuel efficiency in automatic cars. Rolling resistance is the energy that a vehicle needs to send to its tyres to maintain movement at a consistent speed over a surface. In other words, it is the effort required to keep a tyre rolling.
When a tyre rolls on a surface, it deforms slightly at the point of contact due to the weight of the vehicle and the force exerted by the ground. This deformation creates friction and energy loss, contributing to rolling resistance. Under-inflated tyres increase rolling resistance, meaning that your car must use more energy when moving. Properly inflated tyres, on the other hand, are more rigid, reducing the amount of deformation when in contact with the ground, which minimises rolling resistance.
Tire manufacturers often provide specifications indicating the optimal tyre pressure to maximise performance and minimise rolling resistance. Studies have shown that maintaining the correct tyre pressure can improve fuel efficiency by 3% to 4% compared to under-inflated tyres. Additionally, regular wheel alignments will ensure safer and more efficient driving, so it is essential to have them checked during regular services.
To further reduce rolling resistance, you can invest in low rolling resistance tyres, which are engineered with specially formulated tread compounds that are more resistant to heat generation and constructed to minimise tyre deflection for less energy loss. These tyres typically incorporate silica in place of carbon black in their tread compounds to reduce low-frequency hysteresis without compromising traction. However, it is important to note that while low rolling resistance tyres can improve fuel efficiency, they may also have a corresponding reduction in tyre wear life.
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Plan your route to avoid traffic and quick stops
Planning your route efficiently can help you save a lot of fuel. Here are some tips to plan your route to avoid traffic and quick stops:
Use a route planner and route optimisation app: These apps help you plan your routes in advance, creating the most optimised route and avoiding traffic. They reduce repeat trips by maximising the space used in your vehicle for the journey. This saves fuel, time, and money.
Use Satnav for efficient journeys: Before you set out on your drive, use Satnav tools like Google Maps to find the best route that bypasses congestion, school pick-up and drop-off times, traffic lights, and crossing intersections. This will help you avoid quick stops and save fuel.
Use cruise control: Cruise control helps maintain a steady and consistent speed, especially on flat, straight roads, and smoothens out the ups and downs of the road. This helps you avoid slowing down or speeding unnecessarily, and saves fuel.
Avoid multiple trips: If you are likely to make multiple trips, try to combine them into one journey. This is because once your car is parked for a few hours, the engine cools down and will use more fuel for the first few kilometres.
Use eco-mode: If your vehicle has an eco-mode feature, use it. Eco-mode adjusts the engine's performance to maximise fuel efficiency. While it may reduce overall power, it can save you money by reducing fuel consumption and the environmental impact of each journey.
These tips can help you plan your route efficiently, avoid traffic and quick stops, and ultimately save fuel.
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Keep a safe distance from the car in front to avoid sudden braking
Keeping a safe distance from the car in front of you is crucial to avoid sudden braking and save fuel in your automatic car. Here are some essential tips to keep in mind:
First, understand the concept of the three-second rule. This rule recommends maintaining a minimum of three seconds' distance between you and the car in front. To apply this rule, pick a roadside marker, such as a sign or a tree. Then, when the car ahead passes that marker, start counting seconds ("1-1000, 2-1000, 3-1000"). If you reach the marker before counting to three seconds, you're following too closely, and you should increase your distance. This rule is essential because it gives you time to react safely if the car in front of you brakes suddenly.
Additionally, remember to adjust your following distance based on weather, road, and visibility conditions. For example, if you're driving in heavy rain or snow and can't see more than 100 feet ahead, it's recommended to reduce your speed to 30 mph or less. Driving at a slower speed in such conditions ensures you have enough time to react and stop safely if needed. Similarly, driving on wet or gravel surfaces requires extra caution, as your tires may slip, causing a loss of gas mileage and potentially endangering yourself and others.
Another critical aspect of maintaining a safe distance is avoiding tailgating. Tailgating, or following too closely, not only makes it harder for you to see the road ahead but also reduces your reaction time if the vehicle in front of you suddenly brakes. Instead, maintain a safe distance, and if a vehicle merges in front of you too closely, simply take your foot off the accelerator to create more space. This simple action can help you maintain a safer following distance.
By following these guidelines, you can help ensure that you have sufficient time to react to unexpected situations, avoid sudden braking, and ultimately save fuel in your automatic car. These tips contribute to safer driving practices and can help you become a more fuel-efficient driver.
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Frequently asked questions
Here are some ways to save fuel when driving an automatic car:
- Avoid stopping and starting quickly, and try to maintain a steady speed.
- Use cruise control to keep your speed consistent.
- Avoid slamming on the brakes by keeping a safe distance from the car in front of you and anticipating the road ahead.
- Remove unnecessary weight from your car.
- Keep your tyres inflated to the correct pressure.
Cruise control helps you maintain a steady speed, which can improve fuel efficiency. It also reduces the need to accelerate and decelerate, which can save fuel. Additionally, it can help you maintain a safe distance from the car in front of you, reducing the need for sudden braking.
Slamming on the brakes wastes fuel because you need to accelerate again after braking. Braking also causes drag, which impacts fuel economy. Instead of braking suddenly, try to slow down gradually and anticipate stops.
Underinflated tyres increase rolling resistance, which means your car uses more energy to move. Maintaining the correct tyre pressure can improve fuel efficiency and reduce fuel consumption.
Yes, here are a few more tips:
- Use your air conditioning sparingly, and roll down the windows at lower speeds.
- Avoid aggressive driving and rapid acceleration.
- Combine multiple errands into one trip to reduce the number of journeys you make.
- Send your car for regular maintenance to improve fuel economy and reduce repair costs.
