Effective Ways to Save Fuel

Drive at a moderate speed. This is the most efficient and simplest solution to improve fuel efficiency. Fuel consumption increases significantly when you accelerate. For most vehicles, this speed is around 80 km/h.

• In fact, every time you drive above 80 km/h, you spend an additional 5000 VND for every liters of gasoline. Fuel efficiency decreases as you accelerate.
• Additionally, pay attention to traffic signals. Driving faster than necessary often leads to stopping and restarting at traffic lights, which is not ideal for saving fuel.

Avoid tailgating and frequent braking. You can save fuel by not following the vehicle in front too closely. This often leads to repeatedly pressing the accelerator to regain speed and then adjusting the distance by braking, creating a cycle. Frequent speeding up and slowing down consumes more fuel than maintaining a steady speed and a safe distance.

• Repeated braking wastes energy, converting it into useless heat and significantly reducing the lifespan of your car's braking system. In the future, most cars may be equipped with systems that convert braking energy into reusable energy, but unless you're driving a hybrid, your car likely doesn't have this feature yet.

Accelerate gradually. Every time you press the accelerator to speed up abruptly after stopping, you burn extra fuel and increase tire wear. By accelerating slowly, you only use the necessary amount of fuel to get your car moving.

• In short, minimize the use of the brake and accelerator pedals as much as possible. This will help you maximize fuel efficiency.

Drive carefully and stick to one lane. Fuel consumption increases when you slow down and then speed up again. Maintaining a steady speed minimizes fuel usage. Sudden acceleration and deceleration significantly increase fuel consumption.

• Avoid changing lanes frequently. The reason is similar – switching lanes often involves speeding up and slowing down. Stay relaxed and stick to one lane.

Avoid crossing lanes when possible. If possible, limit crossing into another lane. Stopping and waiting at intersections to cross a busy lane causes the engine to idle, wasting fuel. Accelerating again to turn will have the same effect.

Use speed control (overide control) and cruise control on highways. Another way to avoid using the accelerator and brake pedals excessively is through speed control and cruise control on highways. Speed control maintains a low engine speed, enhancing engine longevity.

• Cruise control keeps your car at a steady speed, preventing excessive or insufficient acceleration. However, this system is only useful for long-distance driving – it’s not recommended for city driving, as it won’t make much of a difference.

Use your gearbox wisely. Shifting gears at low speeds or vice versa can waste fuel. Use the gearbox carefully and adjust according to your desired speed. This will reduce strain on the engine.

Drive until your fuel tank is nearly empty. This method follows a simple scientific principle: a lighter car consumes less fuel. What can you do to reduce your car's weight? Avoid filling the tank completely. When your tank is down to one-third and you plan to refuel, wait a few more days. You can stretch that remaining fuel a bit longer.

• Additionally, fuel prices often rise toward the weekend, starting Thursday afternoon. If you need to travel on Saturday, it’s better to refuel now. Monitor fuel price trends to decide if it’s worth refueling immediately.

Avoid excessive idling. If you idle for more than a minute, turn off the engine to save fuel. Newer cars don’t need to be "warmed up" in cold weather – just a few seconds is enough.

• Whenever you’re waiting for someone, turn off the engine. Driving or parking? Park. You can still use the radio without starting the car!

Turn the fuel nozzle upside down when you finish refueling. The nozzle is connected to a fuel line. When you shut off the line, some fuel remains in the nozzle. To retrieve about 100 ml of leftover fuel, turn the nozzle upside down and shake it gently before removing it.

• Lift the fuel line slightly to collect the remaining fuel. Gravity causes fuel to settle at the lowest point, so lifting the line allows it to flow into your tank.

Avoid rolling down car windows at high speeds or using air conditioning. The best cooling method at highway speeds depends on your car type. Rolling down windows creates drag, while using air conditioning increases engine workload. However, you can lower windows when driving in the city.

Park in the shade. This is another scientific principle! A cooler car means less fuel evaporation from the tank, which is like throwing money away.

• Additionally, this prevents your seat from getting scorching hot. It’s beneficial for both your car and you. Touching a steering wheel without burning your hands is a challenge otherwise!

Avoid traffic and bad weather. Saving fuel is difficult during traffic jams, rush hours, or in rain, wind, or high-pressure conditions. Rain, headwinds, and high pressure create wind resistance, forcing you to use more fuel.

• However, tailwinds (wind blowing from behind) can help. Which way is the wind blowing?
• Rush hour increases fuel consumption due to frequent stops, idling, lane changes, and other fuel-inefficient habits.

Turn off all electronic devices and climate controls before shutting off the engine. Of course, everything turns off when the engine stops, but what happens when you restart? If you turn everything off beforehand, you save fuel by not restarting all devices at once. You can then turn them on one by one, making it easier for your car to handle.

Minimize car usage by planning ahead. Try to organize errands and appointments in advance. Completing multiple tasks at once frees up more time. Plan trips on specific days to avoid bad traffic and higher fuel costs later.

• For example, buy non-perishable essentials (pet food, cleaning supplies, dry goods, canned vegetables, etc.) in one trip to reduce the need for multiple car outings.

Reduce vehicle weight. Remove unnecessary items from your car or truck, such as golf clubs or unused tools and materials. Reducing the weight in the truck bed also minimizes fuel consumption by decreasing drag. If the truck bed isn’t lightened, an air cushion forms behind the cabin, creating resistance that disrupts airflow.

• If you need to carry something, place it in the trunk rather than on a roof rack. Items on the roof increase drag, slowing the vehicle and making acceleration harder.

Replace the air filter. A dirty air filter reduces engine power and efficiency, consuming more fuel than a clean one. Replace the air filter if it’s been in use for a long time. This task takes just a few minutes – you can even do it yourself.

• Air filters are relatively inexpensive car parts. In Vietnam, most air filters cost around 200,000 VND.

Keep tires properly inflated. Properly inflated tires help you travel farther on a single tank of fuel. Carry a tire pressure gauge and check tire pressure regularly. Tires naturally lose small amounts of air over time, so don’t worry if one or more tires seem slightly deflated.

• Check tire pressure frequently as outdoor temperatures change. Hot tires have higher pressure due to air expansion – but if you reduce pressure to the recommended level, it may drop too low in colder conditions, so add air in cold weather. Underinflated or overinflated tires increase rolling resistance, reducing fuel efficiency and causing uneven tire wear.
• If you need new tires, choose radial tires. Radial tires have lower rolling resistance, improving aerodynamics.

Follow the manufacturer’s maintenance schedule to optimize fuel efficiency. Replace spark plugs and wires on time, and replace ignition coils when they lose effectiveness (e.g., due to internal faults). A well-maintained engine produces more energy without using extra fuel.

Use synthetic oil to save fuel. Additionally, fewer oil changes save time spent at maintenance shops and reduce the amount of oil waste released into the environment.

• When visiting a maintenance shop, ask the mechanic which oil type is best for your car and improves fuel efficiency. They might provide you with a bottle or two during the service.

Pay attention to tire specifications. Before switching to modern, wider tires, reconsider. Wider tires increase rolling resistance and fuel consumption.