A hire car can make a Perth stay, a work week or a road trip far easier – but fuel costs can quickly take the shine off a good daily rate. Knowing how to choose a fuel efficient hire car helps you keep more of your travel budget for the parts of the journey that matter: good coffee, a better meal, an extra night away or simply less stress at the bowser.
The right choice is not always the smallest car on the list. A vehicle that looks economical can become less practical if it is cramped for passengers, struggles with your luggage or is not suited to the kilometres you plan to cover. The best rental is the one that fits your trip comfortably while using fuel sensibly.
Start with the kilometres, not the car size
Before comparing vehicles, think about where you will actually drive. Someone heading between meetings around Perth for two days has very different needs from a family planning a week of coastal drives, country towns and long stretches of open road.
For shorter urban trips, a compact hatch or small sedan is often a smart option. These cars are generally easy to park, light on fuel and comfortable for one or two people with everyday bags. Stop-start traffic can still use more fuel than expected, so a smaller vehicle makes particular sense when most of your driving is around suburbs, shopping precincts and city streets.
For a longer journey, do not focus on the fuel figure alone. A slightly larger, modern sedan or SUV may be the better value if it gives you room to travel without overloading the cabin or boot. Packing luggage on seats, squeezing adults into the back or choosing a car that feels underpowered on longer roads can turn a low-fuel trip into an uncomfortable one.
A simple rule works well: choose the smallest vehicle that comfortably suits every passenger, every bag and the roads on your itinerary.
Check the fuel type and consumption figure
Fuel efficiency is usually expressed as litres per 100 kilometres, written as L/100 km. The lower the number, the less fuel the vehicle is expected to use over that distance. It is a useful comparison tool, especially when you are deciding between two cars in a similar size category.
However, the published figure is a guide, not a promise. Your real-world use changes with traffic, air conditioning, passenger load, driving speed and road conditions. A car that performs well during a gentle weekday commute may use more fuel with four adults, a full boot and a long run at highway speeds.
Petrol vehicles remain a straightforward choice for many hire customers because refuelling is familiar and widely available. Hybrid cars can be particularly economical in stop-start driving, where they can make better use of low-speed electric power. On the other hand, if most of your trip involves steady highway kilometres, the difference may be smaller than you expect.
The key is to pick a fuel type that suits your confidence and travel plan. Saving a little at the pump is not worth adding uncertainty to your trip. If you are unsure, ask the rental team which available vehicle is likely to suit your route and passenger numbers.
Work out the likely fuel cost
You do not need a spreadsheet to make a sensible estimate. Take the car’s L/100 km figure, multiply it by your expected kilometres, then divide by 100. That gives you the approximate litres you may use. Multiply that result by the current fuel price and you have a practical budget guide.
For example, a car using 6.5 L/100 km over a 500 km trip would use roughly 32.5 litres. This will never be exact, but it is enough to compare options before you book. A difference of only one or two litres per 100 km can add up on a longer trip.
Choose a fuel efficient hire car without sacrificing comfort
There is a reason compact cars are popular, but they are not the automatic answer for every booking. Comfort affects how you drive, how often you stop and how enjoyable the trip feels. If a car is too small for your group, it can make a simple drive feel like hard work.
Start with passenger space. Two adults travelling light can usually be happy in a smaller car. Add children, taller passengers or several adults and rear-seat room becomes more relevant. Then consider luggage honestly. A couple of soft bags are different from suitcases, a pram, work equipment or camping gear.
Air conditioning is another practical consideration in Western Australia. Using it does increase fuel use slightly, particularly in smaller cars and in heavy traffic, but comfort and concentration come first. The goal is sensible efficiency, not an uncomfortable drive with the air conditioning switched off on a hot day.
If your plans include a lot of regional driving, look for a vehicle that feels settled and comfortable at road speeds. Modern, well-maintained cars can deliver good economy without feeling bare-bones. Features such as cruise control can also help maintain a steady speed on suitable roads, which may support more consistent fuel use.
Look beyond the daily hire rate
The cheapest advertised car is not necessarily the cheapest trip. Compare the whole picture: daily hire cost, likely fuel spend, excess kilometres if they apply, insurance options and the vehicle size you genuinely need.
A very low daily rate can lose its appeal if the car uses considerably more fuel than another available option. Equally, paying extra for a bigger vehicle that you do not need can add unnecessary cost at both the booking stage and the bowser.
It is also worth considering convenience. A clean, ready-to-drive vehicle in good condition is less likely to create delays or doubts when you are trying to get moving. A local provider with responsive support can be especially valuable when your plans change, you need clarity on the vehicle or you have a question outside the usual rush of the day.
At Ride Rental, the focus is on keeping that choice simple: a well-maintained vehicle, clear booking steps and a helpful local team when you need an answer.
Ask these questions before you confirm
Most bookings are straightforward, but a few quick questions can help you avoid choosing on price alone. Ask what fuel the vehicle takes, whether its listed consumption is available, how much boot space it offers and whether it is best suited to your passenger count.
If you have a specific plan, say so. Mention that you are driving mostly around Perth, taking a weekend trip with friends or covering several hundred kilometres for work. The more clearly you describe the trip, the easier it is to match you with a car that makes sense.
Also check the fuel return requirement. Many rentals are supplied with a set fuel level and should be returned at the agreed level. Filling up shortly before return, keeping your receipt and allowing time to find a service station can prevent last-minute hassle.
Small driving habits make a real difference
Once you have chosen the car, your driving style has a genuine effect on consumption. Smooth acceleration, gentle braking and keeping a steady speed use less fuel than constant hard acceleration and late braking. On longer drives, avoiding unnecessary idling can help too.
Keep the car reasonably light and the boot organised. You do not need to travel with nothing, but avoid carrying gear you will not use. Make sure tyres look properly inflated and tell the rental team if you notice anything unusual. Under-inflated tyres can affect both handling and fuel use.
Plan your route before leaving where possible. A few extra kilometres may be worth it if the route avoids repeated congestion, but do not obsess over finding a perfect path. The most fuel-efficient trip is still one that gets you where you need to go safely, comfortably and on time.
A good hire car should give you freedom, not another thing to manage. Choose a vehicle that suits the way you will travel, drive it calmly and enjoy the extra room left in your budget for the journey ahead.
