Owning a car is costly, now more so than ever. We take a look at some of the simple things you can do to keep your driving costs in check.
Owning a car isn't cheap but for many it's an essential cost given how limited public transport is in many parts of the country.
And with the cost of fuel rising sharply in recent weeks as a result of conflict in the Middle East, it's more expensive than ever.
But there are some simple things you can do to avoid spending more on fuel and the upkeep of your car than you need to.
1. Avoid driving on an empty (or overly full) tank
How much fuel your car uses isn’t just down to engine size or distance as a few small habits can make a real difference.
Running your tank close to empty isn’t a great idea. It can put strain on the fuel pump and increase the risk of dirt or debris being pulled into the system. It also leaves you with very little margin if you get stuck in traffic or take a detour.
At the other extreme, regularly filling right to the brim isn’t ideal either. A heavier car uses slightly more fuel, and overfilling can lead to fuel expanding in warmer weather. Best approach? Keep your tank comfortably topped up — around a quarter to three-quarters full.
2. Slow down (even a little)
This mightn’t be the most popular tip. But it works.
Fuel consumption rises sharply at higher speeds due to wind resistance. In fact, once you’re above around 80 km/h, a large chunk of your fuel is being used just to push air out of the way.
Even easing back slightly on longer journeys can make a noticeable difference. You don’t need to crawl along, just driving a bit more steadily and avoiding top speeds where possible can cut your fuel bill.
3. Drive more smoothly
Harsh braking and rapid acceleration burn through fuel.
Try to anticipate what’s happening ahead: ease off the accelerator earlier, keep a steady speed, and avoid unnecessary stop-start driving where possible. It’s a small change that adds up over time.
4. Keep your tyres properly inflated
Under-inflated tyres increase rolling resistance, meaning your engine has to work harder.
That’s bad for both safety and your wallet.
Tyre pressure can also drop in colder weather, so it’s worth checking it every few weeks. The correct pressure will be in your car manual or inside the driver’s door.
5. Lighten the load
We all carry more in the car than we need.
Extra weight means higher fuel consumption, so clear out anything you don’t use regularly. Roof racks and bike carriers also create drag so remove them when they’re not needed.
6. Use your gears efficiently
Changing up gears a little earlier can help reduce fuel use.
Driving in a higher gear at lower revs (without straining the engine) is generally more efficient. Many estimates suggest good gear use can cut fuel consumption by up to 10–15%.
7. Air con vs windows — use both wisely
Air conditioning uses fuel but so does driving with the windows down at speed.
A simple rule of thumb:
- At lower speeds: open your windows
- At higher speeds: use the air con
That way, you minimise both engine load and drag.
8. Keep your car well maintained
A well-serviced car runs more efficiently.
Things like old oil, clogged filters or engine issues can all increase fuel consumption. And don’t ignore warning lights — small problems can become expensive ones quickly.
9. Avoid unnecessary idling
If you’re stopped for more than a few minutes, it’s usually more efficient to turn off the engine.
Modern start-stop systems are designed to do this automatically — so it’s best to leave them on. Idling wastes fuel and adds to wear and tear.
10. Think about alternatives where you can
Not every journey needs to be done by car.
If it suits, walking, cycling, or public transport can save you a lot over time. The Cycle to Work Scheme is particularly good value, especially for higher-rate taxpayers, and can significantly reduce the cost of a new bike.
And the new multi-mode transport ticket for the greater Dublin area is great value too and costs from just over €50 a month for unlimited travel on Dublin bus, Dart and Luas if you get it through your employer.
11. Don’t overpay for car insurance
Fuel isn’t the only cost worth tackling.
Even though premiums have eased a little recently, many drivers still overpay by auto-renewing. It’s always worth shopping around come renewal and it only takes a few minutes.
Check out our new car insurance service at bonkers.ie to see how much you could save.
