Fuel prices continue to fluctuate, and for many Australian drivers, improving the fuel efficiency of a car has become more important than ever. Whether you drive a compact hatchback, a family SUV, or a performance vehicle, how efficiently your car uses fuel affects your running costs, environmental footprint, and overall driving experience.
Estimated reading time: 5 minutes
Table of contents
- What Is Fuel Efficiency of a Car?
- Why Fuel Efficiency Matters
- Factors That Affect Fuel Efficiency of a Car
- 1. Driving Habits
- 2. Vehicle Weight
- 3. Tyre Pressure and Condition
- 4. Engine Maintenance
- 5. Aerodynamics
- Driving Tips to Improve Fuel Efficiency of a Car
- How Car Accessories Affect Fuel Efficiency
- Fuel Efficiency and Different Car Types
- Improving Fuel Efficiency Without Changing Your Car
- The Role of Technology in Fuel Efficiency
- Final Thoughts: Drive Smarter, Save More
In this guide, we’ll break down what fuel efficiency really means, what factors affect it, and practical steps you can take to improve the fuel efficiency of your car—without sacrificing comfort or performance.
What Is Fuel Efficiency of a Car?
Fuel efficiency refers to how far a car can travel using a certain amount of fuel. In Australia, this is commonly measured in litres per 100 kilometres (L/100km). The lower the number, the more fuel-efficient the car.
For example:
- A car that uses 5.5 L/100km is more fuel-efficient than one that uses 9.0 L/100km
- Better fuel efficiency means fewer trips to the servo and lower fuel costs over time
Improving the fuel efficiency of a car isn’t just about the engine—it’s influenced by driving habits, vehicle condition, weight, aerodynamics, and even accessories.
Why Fuel Efficiency Matters
Improving fuel efficiency offers several key benefits:
1. Lower Fuel Costs
Fuel is one of the biggest ongoing expenses of owning a car. Even a small improvement in fuel efficiency can save hundreds of dollars per year.
2. Reduced Environmental Impact
Better fuel efficiency means lower fuel consumption and fewer carbon emissions, helping reduce your car’s environmental footprint.
3. Improved Vehicle Longevity
Efficient driving and proper maintenance reduce stress on your engine and drivetrain, potentially extending your vehicle’s lifespan.
Factors That Affect Fuel Efficiency of a Car
1. Driving Habits
How you drive has one of the biggest impacts on fuel efficiency.
- Aggressive acceleration increases fuel use
- Sudden braking wastes momentum
- High-speed driving dramatically increases fuel consumption
Smooth, consistent driving is key to better fuel efficiency.
2. Vehicle Weight
The heavier the car, the more energy it needs to move.
Common sources of unnecessary weight include:
- Tools and equipment left in the boot
- Roof racks or cargo boxes when not in use
- Accessories that add mass without functional benefit
Reducing excess weight improves the fuel efficiency of a car almost immediately.
3. Tyre Pressure and Condition
Underinflated tyres create more rolling resistance, forcing the engine to work harder.
- Check tyre pressure at least once a month
- Follow manufacturer-recommended PSI levels
- Replace worn tyres that reduce grip and efficiency
Proper tyres can significantly improve fuel efficiency and safety.
4. Engine Maintenance
A well-maintained engine runs more efficiently.
Key maintenance items include:
- Regular oil changes
- Clean air filters
- Properly functioning spark plugs
- Timely servicing
Neglecting maintenance can quietly reduce fuel efficiency over time.
5. Aerodynamics
Poor aerodynamics increase drag, especially at highway speeds.
Examples of aerodynamic drag:
- Roof racks left installed
- External accessories that disrupt airflow
- Windows open at high speeds
Improving airflow helps maintain better fuel efficiency of a car on long drives.
Driving Tips to Improve Fuel Efficiency of a Car
Drive Smoothly
Gradual acceleration and gentle braking reduce fuel consumption and engine strain.
Maintain Steady Speeds
Using cruise control on highways helps maintain consistent fuel use and prevents unnecessary acceleration.
Avoid Excessive Idling
Modern cars don’t need long warm-ups. Idling wastes fuel without moving the vehicle.
Plan Your Trips
Combining errands and avoiding heavy traffic can significantly improve fuel efficiency.
How Car Accessories Affect Fuel Efficiency
Not all modifications hurt fuel efficiency—some can actually help.
Helpful Accessories
- Low-resistance tyres
- Aerodynamic body components
- Quality seat covers (protect seats without adding excess weight)
- Interior organisers (prevent clutter buildup)
Accessories That Can Reduce Fuel Efficiency
- Heavy bull bars
- Permanent roof racks
- Oversized wheels and tyres
- Poorly fitted external accessories
Choosing the right accessories from trusted suppliers like AutoMods ensures your upgrades don’t negatively impact efficiency.
Fuel Efficiency and Different Car Types
Small Cars and Hatchbacks
Typically the most fuel-efficient due to lighter weight and smaller engines.
SUVs and 4WDs
Less fuel-efficient by design, but proper maintenance and driving habits can significantly improve performance.
Performance Cars
Higher power output often means higher fuel consumption, but modern tuning and driving techniques can optimise fuel efficiency.
Hybrid and Petrol Cars
Hybrids excel in stop-start traffic, while petrol cars benefit more from efficient highway driving.
Improving Fuel Efficiency Without Changing Your Car
You don’t need to buy a new car to improve fuel efficiency. Simple changes make a big difference:
- Remove unnecessary cargo
- Keep tyres properly inflated
- Service your vehicle regularly
- Adjust driving habits
- Use quality accessories designed for your vehicle
These steps can improve fuel efficiency by 10–20% over time.
The Role of Technology in Fuel Efficiency
Modern vehicles use technology to maximise fuel efficiency, including:
- Engine start-stop systems
- Eco driving modes
- Advanced fuel injection systems
- Lightweight materials
Understanding how these features work—and using them correctly—can further improve the fuel efficiency of a car.
Final Thoughts: Drive Smarter, Save More
Improving the fuel efficiency of a car is one of the smartest ways to reduce running costs, lower emissions, and get more value from every tank of fuel. With the right driving habits, regular maintenance, and carefully chosen accessories, you can significantly improve efficiency without compromising comfort or style.
At AutoMods.com.au, we offer a wide range of car accessories designed to support smarter, more efficient driving. Whether you’re upgrading your interior, protecting your vehicle, or improving everyday usability, the right choices can help you get more from every kilometre.
🚗 Drive smarter. Spend less on fuel. Explore AutoMods today.
