How Much Fuel Can You Actually Save with Better Driving?
Author: Toby Date Posted:17 April 2026
With fuel prices sitting around $2.20–$2.30 per litre for petrol and even higher for diesel in some parts of Australia, every litre saved counts. The question most drivers ask is simple: does changing how you drive really make a difference?
Short answer, yes. And in many cases, more than you’d expect.
The Real Impact of Driving Habits
Aggressive driving, constant braking, and stop-start behaviour all increase fuel consumption.
Studies and real-world testing show that poor driving habits can increase fuel use by up to 20–30% in city conditions. On the flip side, smoother and more controlled driving can significantly reduce that.
For example:
If your car normally uses 8L/100km, aggressive driving could push that to 9.5–10.5L/100km. With better habits, you could bring it back down or even slightly below the original figure.
Where the Biggest Savings Come From
Inertia is Efficiency
Rapid acceleration burns more fuel because the engine works harder to deliver power quickly. Easing into the throttle and braking earlier can reduce fuel use by 10–20% in urban driving.
A simple way to think about it is “inertia is efficiency.” Keeping your car moving smoothly uses less fuel than constantly speeding up and slowing down. This is where coasting comes in, lifting off the throttle early and letting the car slow down naturally instead of braking late. A mate of mine jokes about doing a rolling stop these days, but with fuel prices like this, it’s hard to argue.
It also ties into “drive slow when you need to go.” In traffic, rushing between stops usually wastes fuel without saving time, while smoother, more controlled driving helps maintain momentum and efficiency.
Engine Braking
This is kind of a follow-up on the previous point, but just to give it a name and further elaboration, Engine Braking is when you slow the car by easing off the accelerator while staying in gear, instead of relying entirely on the brakes. In modern vehicles, this can actually reduce fuel use because the engine cuts fuel delivery when you’re off the throttle.
It also helps you stay in control and reduces unnecessary braking, which means less wasted momentum and better overall efficiency, especially in stop-start traffic or downhill sections.
Reducing Idling
Idling might seem harmless, but it adds up. Most vehicles use 0.5 to 1 litre of fuel per hour while idling. Even short daily idling periods can waste 40–60 litres per year.
Avoiding Unnecessary Weight
Extra weight means more work for the engine. Every 50 kg of additional load can increase fuel consumption by around 1–2%.
All of this works best when applied with a bit of common sense. Safety, road rules, and traffic conditions always come first. Coasting, smoother driving, and reducing unnecessary braking should improve efficiency, not compromise control or awareness. The goal is to drive smarter, not riskier.
How Much Can You Save in Real Terms?
Let’s put it into perspective.
If you drive around 15,000 km per year with a vehicle averaging 8L/100km, you’ll use about 1,200 litres of fuel annually.
At $2.30 per litre, that’s roughly $2,760 per year on fuel.
Now apply a realistic 15–25% improvement from better driving habits:
- Fuel saved: 180–300 litres per year
- Money saved: roughly $400–$700 annually
For higher-mileage drivers or those commuting daily, the savings can be even greater.
It’s Not Just About Fuel
Saving fuel doesn’t just reduce costs at the bowser. It also:
- Reduces engine wear
- Improves overall vehicle performance
- Lowers long-term maintenance costs
In a time where fuel prices are driven by global events and supply disruptions, improving efficiency is one of the few things you can actually control.
Small Changes, Real Savings
You don’t need to completely change how you drive overnight. Even small adjustments like easing off the throttle, planning your braking, and avoiding unnecessary idling can add up over time.
When combined with regular maintenance, these changes can deliver hundreds of dollars in annual savings.
Keep Your Car Running Efficiently with Superspares
Better driving is only part of the equation. Keeping your vehicle in good condition is just as important for fuel efficiency.
Superspares makes it easy to find filters, spark plugs, and maintenance components for passenger cars, performance vehicles, and 4WDs across Australia. As a trusted Australian car parts store, we help drivers reduce fuel consumption and keep their vehicles running efficiently without unnecessary costs.
Written by Toby Martin
Automotive Content Specialist
