The National Consumer Agency says that, by switching from a large car to a small hatchback model, drivers can save more than €540 a year in fuel costs.

1. Switch to a smaller model

If buying a new car, check the fuel consumption and CO2 emissions labels (which by law must be displayed on the windscreen) and opt for the most efficient car that matches your needs and budget.

2. Avoid using your car unnecessarily

Consider walking, cycling or taking public transport instead of automatically reaching for your car keys.

If driving is the only option, see if you can share the journey with someone else. Websites such as www.gumtree.ie have sections that enable you to network with others interested in car-pooling, ride-sharing or co-ordinating school runs.

3. Reduce air drag

Although it may seem convenient to leave a roof rack permanently in place, it seriously affects the aerodynamics of your car.

By simply removing the roof rack when it's not is use, you can cut your fuel consumption by as much as 40 per cent. And while you might enjoy the refreshing feel of the wind in your hair as you motor along with windows and sun-roof open, it is far more fuel efficient to open the air vents instead.

4. Avoid road rage

According to the Society of the Irish Motor Industry, an aggressive driving style can increase fuel consumption by as much as 12 per cent, while increasing harmful emissions by 30 to 40 per cent. The society advises drivers to avoid sharp acceleration and heavy braking. Over-revving the engine unnecessarily is another no-no, and you should shift into the highest appropriate gear as soon as possible.

5. Don't idle

Whether waiting for a passenger who has just nipped into the shops, or stuck in a major tailback, most drivers leave their car idling indefinitely, churning out noxious fumes. If it's safe to do so, you should switch off your engine. Even if you're only stationary for 30 seconds, it's still more economical to turn off your engine and restart than to leave it idling.

6. Switch off unnecessary electrical devices

Bear in mind that using the electrical devices in your car increases your fuel consumption. Don't compromise on safety, but avoid leaving them on unnecessarily.

For example, switch off your rear-window demister as soon as the window has cleared, as this will reduce unnecessary fuel consumption by up to 5 per cent.

7. Declutter

Spring-cleaning the boot of your car and finding an alternative home for those heavy golf clubs and children's buggies is a simple way of cutting both fuel consumption and harmful emissions. Also, think twice before filling your fuel tank to the brim - the fuel used up by carrying around the excess weight of a full tank can cost up to €100 a year.

8. Tyre pressure

Check your tyre pressure at least once a month, ensuring that all tyres are inflated to the manufacturer's specifications. Under-inflated tyres can increase fuel consumption by 2 per cent.

9. Regular service

Get your car serviced regularly, as wheel alignment and poorly-adjusted brakes increase fuel consumption. Even a clogged air filter can increase fuel usage by as much as 10 per cent. Regular oil changes will also save fuel as clean oil has better lubricating properties and so reduces friction in the engine and transmission.

10. Slow down

Fuel efficiency drops significantly at speeds of more than 100km/h. By maintaining a cruising speed in the 90-100km/h range, you can enhance your fuel efficiency by 15 per cent, not to mention increasing your chances of arriving safely at your destination.