Eco-Driving Tips — How to Save Fuel and Reduce Emissions

Eco-driving to save fuel — the quick answer

Simple eco-driving cuts fuel use by 10-20% for free: read the road ahead so you brake less, shift up early, hold a steady motorway speed, and never idle. Every litre saved is €1.50-2.00 and about 2.3 kg of CO2. Under-inflated tyres and roof boxes quietly waste the most of all. The full technique list is below.

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Eco-driving is not about driving slowly or sacrificing comfort. It is about driving smoothly, maintaining your vehicle properly, and making intelligent decisions about route, speed, and vehicle loading. These techniques require no special equipment and can reduce your fuel consumption by 10-25%.

Driving Technique — The Biggest Factor

Smooth Acceleration

Aggressive acceleration is the single largest fuel-waster. A heavy foot on the accelerator can double fuel consumption during acceleration phases.

Best practice:

• Accelerate gently — aim for about 2,000 RPM in petrol cars, 1,500-2,000 RPM in diesels
• In a manual, shift up early — by 2,000-2,500 RPM
• In an automatic, use gentle throttle to encourage early upshifts
• Avoid “jackrabbit” starts from traffic lights

Anticipate Traffic Flow

Looking well ahead and anticipating stops, slowdowns, and traffic lights dramatically reduces the need for harsh braking and re-acceleration.

Best practice:

• Look 200-300 metres ahead for brake lights, traffic signals, and roundabouts
• Lift off the accelerator early when approaching a red light — it may turn green before you arrive, eliminating the need to stop completely
• Maintain a following distance that allows smooth speed adjustments rather than sudden braking
• Approach roundabouts at a steady speed rather than braking late

Engine Braking

When you lift off the accelerator while in gear, modern fuel-injected engines cut fuel supply entirely. This means engine braking uses zero fuel — less than idling in neutral. Use engine braking to slow down before needing your brakes.

Optimal Speed

Aerodynamic drag increases with the square of speed. This means driving at 130 km/h instead of 110 km/h increases aerodynamic drag by approximately 40%.

On a 500 km motorway journey, driving at 110 km/h instead of 130 km/h adds approximately 15 minutes to your journey but saves 8-10 litres of fuel — approximately EUR 15-20 at current prices.

Minimise Idling

A modern car engine uses approximately 0.5-1.0 litres of fuel per hour at idle. If you are stopped for more than 60 seconds (not in traffic), switch off the engine. Many modern cars have start-stop systems that do this automatically.

Vehicle Maintenance for Efficiency

Tyre Pressure — The Easy Win

Under-inflated tyres increase rolling resistance, which increases fuel consumption. This is one of the simplest and most effective fuel-saving measures.

Check tyre pressure at least monthly and always when the tyres are cold. For detailed guidance, see our tyre pressure guide.

Tip: Some manufacturers list an “eco” or “full load” pressure that is slightly higher than the standard recommendation. Using this pressure (when not uncomfortable) can further reduce rolling resistance.

Engine Oil

Using the correct grade of engine oil reduces internal friction. Modern low-viscosity oils (0W-20, 5W-30) provide measurable fuel savings compared to older, thicker oils. Always use the oil grade specified by your vehicle manufacturer.

Air Filter

A clogged air filter restricts airflow to the engine, increasing fuel consumption. Replace the air filter at the intervals recommended in your service schedule, or sooner if you drive in dusty conditions.

Spark Plugs and Engine Health

Worn spark plugs, faulty sensors, or engine management issues can increase consumption by 5-20%. Stay on top of regular servicing.

Tyre Choice and Fuel Economy

The tyres you choose have a measurable impact on fuel consumption:

EU Tyre Label — Rolling Resistance

The EU tyre label rates rolling resistance from A (best) to E (worst). The difference between an A-rated and E-rated tyre can be 0.5-0.7 litres per 100 km — over the life of a set of tyres, this translates to hundreds of euros in fuel savings.

For more on tyre labels, see our EU tyre label guide.

Tyre Width

Wider tyres generally have higher rolling resistance than narrower tyres. If your vehicle manufacturer offers multiple approved tyre sizes, the narrower option will typically be more fuel-efficient.

Use our tyre size calculator to check compatible sizes for your vehicle.

Route Planning and Habits

Plan Your Route

• Use real-time traffic apps to avoid congestion — stop-start traffic consumes far more fuel than flowing traffic.
• Combine multiple errands into a single trip rather than making several short trips. A cold engine uses significantly more fuel than a warm one.
• On motorways, choosing a route that is 10 km longer but avoids city traffic may actually use less fuel.

Reduce Weight and Drag

A roof box at 120 km/h can increase fuel consumption by 20% due to aerodynamic drag. Remove it when not needed.

Smart Air Conditioning Use

• Below 80 km/h: open windows instead of AC
• Above 80 km/h: close windows and use AC (less drag than open windows)
• Use recirculation mode to cool already-cooled air
• Park in shade to reduce the AC workload when you restart
• Set the AC to 22-23°C rather than maximum cold

Measuring Your Fuel Efficiency

Most modern cars display real-time and average fuel consumption on the dashboard. Use this to:

1. Establish your baseline — note your average consumption over a normal week.
2. Apply eco-driving techniques — then compare your new average.
3. Track progress — the feedback loop motivates continued efficient driving.

Alternatively, use the traditional method: fill the tank, reset the trip meter, drive normally, refill, and divide litres used by kilometres driven. Our fuel cost calculator can help you estimate costs for any journey.

Eco-Driving for Electric Vehicles

Many of these principles apply to EVs, where efficiency extends range:

• Smooth acceleration and regenerative braking are even more impactful
• Speed has a dramatic effect on range — 110 km/h vs 130 km/h can mean 20-30% more range
• Tyre pressure is critical — EVs are heavier, amplifying rolling resistance effects
• Pre-conditioning the cabin while plugged in saves battery
• Use seat heaters instead of cabin heating in winter

Conclusion

Eco-driving is the most cost-effective way to reduce your motoring costs and environmental impact. No purchases are required — just smoother driving, proper vehicle maintenance, and intelligent route planning. The 10-25% fuel saving translates to hundreds of euros per year for a typical driver.

Start with the three highest-impact changes: maintain correct tyre pressure, drive at moderate motorway speeds, and accelerate smoothly. These alone can deliver a 10-15% improvement. For more on tyre care and maintenance, explore our tyre pressure guide and tyre rotation guide.