Why Fuel Economy Is Worth Optimising
Fuel typically accounts for a significant chunk of total vehicle running costs. Small improvements in fuel economy, compounded across tens of thousands of kilometres, translate into real money saved. Better still, most fuel-saving habits also reduce wear on your engine, brakes, and tyres — so the savings extend further than just the petrol station.
1. Keep Tyres Properly Inflated
Under-inflated tyres create more rolling resistance, which means your engine works harder to move the car. Check your tyre pressure at least monthly and before long trips. The correct pressure is listed in your owner's manual and on a sticker inside the driver's door — not on the tyre sidewall (that's the maximum pressure, not the recommended one).
2. Smooth Acceleration and Braking
Aggressive acceleration burns far more fuel than gradual, smooth acceleration. Similarly, anticipating stops and coasting to a deceleration wastes less energy than braking hard at the last moment. Every time you brake, you're converting fuel energy (momentum) into heat and throwing it away. Drive smoothly and you'll see a noticeable difference at the pump.
3. Use Cruise Control on Highways
Humans are bad at maintaining a perfectly constant speed — we unconsciously speed up and slow down. Cruise control eliminates that variation on open roads, keeping speed steady and fuel consumption consistent. On long highway drives, this alone can improve economy measurably.
4. Reduce Unnecessary Weight
Your engine burns fuel to move mass. Every kilogram of unnecessary weight you carry costs you fuel. Clear out your boot — that set of golf clubs that lives there permanently, the tools, the old shopping bags. It might seem trivial, but weight reduction has a real effect on economy, especially in urban stop-start driving.
5. Remove Roof Racks and Cargo Carriers When Not in Use
Roof racks dramatically increase aerodynamic drag, even when empty. At highway speeds, aerodynamic drag is the dominant force your engine fights. An empty roof rack can increase fuel consumption by several percent. Take it off when you're not using it — it takes minutes and saves money.
6. Avoid Extended Idling
A running engine sitting still gets zero kilometres per litre. If you're parked and waiting for more than a minute or two, turning the engine off saves fuel. Modern engines are designed to handle frequent start-stop cycles (and many newer cars do this automatically). The old concern about starter motor wear from frequent restarts is outdated with modern vehicles.
7. Use the Right Fuel Grade
Using premium fuel in an engine designed for regular unleaded doesn't improve performance or economy — it just costs more. Equally, using regular fuel in an engine that requires premium can cause engine knock and actually hurt performance and longevity. Use whatever grade your owner's manual specifies.
8. Maintain Your Vehicle
A dirty air filter, worn spark plugs, and old engine oil all force the engine to work harder. Keeping up with your maintenance schedule directly supports fuel efficiency. This is one area where the cost of maintenance genuinely pays for itself.
9. Use Air Conditioning Wisely
Air conditioning puts a real load on your engine, increasing fuel consumption — especially in city driving. At lower speeds and moderate temperatures, opening windows is more efficient. At highway speeds, the aerodynamic drag from open windows can outweigh the AC cost, so use AC at highway speeds and windows in town.
10. Plan Your Trips
Cold engines run less efficiently and produce more emissions. Combining multiple short errands into one trip means your engine spends more time at operating temperature. Use navigation apps that offer fuel-efficient routing, and where possible, avoid peak-hour traffic — stop-start congestion is the worst condition for fuel economy.
The Bottom Line
None of these tips require spending money or changing your car. They're habits — and habits compound. Adopt several of them consistently and you'll reduce your fuel costs, reduce your environmental footprint, and likely extend the life of your vehicle at the same time.