Every time you fill up, you feel it. The figure on the pump keeps climbing, the tank empties at the same pace it always did, and the mental maths gets harder to ignore. The good news is that the single most effective thing you can do about your fuel bill does not involve driving less or finding a cheaper station. It involves choosing the right car.
Petrol users are taking the worst of it – diesel is a more positive story
According to independent economist John Loos, writing in his May 2026 Household Sector Economy Outlook, the Gauteng petrol price is now running at a year-on-year inflation rate of 24.57%. Loos warns that heading into the third month of the Middle East conflict, slower economic growth and interest rate hikes appear increasingly likely alongside the fuel shock, and that South African consumers are set to become more cautious across the board.
With the temporary levy cuts winding down from June and disappearing entirely in July, there is little reason to expect relief soon. And while diesel is currently showing an over-recovery that could bring a small measure of relief next month, petrol is heading in the opposite direction, with the Central Energy Fund’s latest data pointing to an under-recovery of between 82 and 84 cents per litre in June, before the General Fuel Levy is added back in stages.
“We have no control over the price of petrol or diesel. What we can control is what we drive, now is the time to seriously consider trading in your car for something more fuel efficient”, says Mike Pashut, Founder and Owner of Changecars.
Choosing what you drive can make a big difference
Selecting a fuel-efficient second-hand car right now is less a lifestyle preference and more a straightforward financial decision.
“If you really want to make your fuel budget work harder, the most direct advice is this: consider switching to diesel. Diesel engines are generally more fuel-efficient than their petrol equivalents, produce more torque, and tend to perform especially well on long highway runs”, explains Pashut.
Here are three of the most popular and practical second-hand diesel options on South African roads right now.
- Toyota Hilux 2.4 GD-6
The Hilux needs little introduction. The 2.4 GD-6 turbodiesel’s real-world fuel consumption for mixed driving typically comes in between 6.5 and 7.8 L/100 km, depending on load, driving style, and terrain. On a steady highway run, figures closer to the lower end are achievable.
- Volkswagen Golf 7 2.0 TDI
The Golf 7 TDI is arguably the most refined diesel hatchback you can buy second-hand in South Africa right now. VW claimed a consumption figure of 4.5 L/100 km for the 2.0 TDI, and real-world owner data broadly support figures of between 4.8 and 5.5 L/100 km in mixed driving conditions, making it one of the most economical options in its class.
- Ford Ranger 2.2 TDCi
The Ford Ranger 2.2 TDCi is a strong second-hand diesel choice for buyers who need bakkie practicality without the Hilux price premium. Real-world fuel consumption for the 2.2 TDCi typically ranges from 7.5 to 9.0 L/100 km, depending on load and driving conditions, which is competitive for a vehicle of its size and capability.
If you can’t go diesel, you can still save petrol
“Petrol hatchbacks remain a sensible choice, particularly in urban and suburban driving where fuel efficiency is more about engine size and weight than fuel type”, says Pashut, “Two models that consistently come up in this conversation are the Volkswagen Polo and the Suzuki Swift, and they make for an interesting comparison”.
Both sit in South Africa’s most competitive segment, both are widely available second-hand, and both are known for reasonable fuel economy. But they suit different buyers.
On fuel consumption, the Swift has the edge. According to Suzuki Auto South Africa, the current 1.2-litre Swift has a claimed combined fuel consumption of 4.4 L/100 km across all derivatives.
The Polo Vivo range covers more ground in terms of engine options, and so does its fuel consumption spread. Volkswagen South Africa confirms the claimed figures: 5.5 L/100 km for the entry-level 1.4 55kW derivative, 5.9 L/100 km for the 1.4 63kW Life, and 4.8 L/100 km for the turbocharged 1.0 TSI GT. That gap between the Swift and the mid-range Vivo adds up meaningfully at current petrol prices over a full year of driving.
Fuel efficiency is about the driver as much as the car
Smooth driving: “This is the single biggest lever you have; aggressive acceleration, hard braking, and speeding can increase your fuel consumption by up to 40% compared to steady, anticipatory driving”, explains Pashut. In stop-start city traffic, the habit of reading the road ahead and coasting rather than accelerating into a queue makes a noticeable difference over time.
Speed works against you: Most cars reach peak fuel efficiency well below 100 km/h, and fuel consumption rises noticeably as speed increases due to increasing wind resistance. Where traffic and road conditions allow, maintaining a steady, moderate speed and using cruise control on flat stretches will make a meaningful difference over a long trip.
Underinflated tyres: Increase rolling resistance, and according to the US Department of Energy, correct tyre pressure can improve fuel economy by 0.6% on average and up to 3% in cases of significant under-inflation. A quick pressure check every few weeks costs nothing and pays for itself at the pump.
Remove roof racks and heavy cargo: Extra drag and load force the engine to work harder.
Switch off: If you are sitting in a long queue or waiting at a school, switch the engine off. Idling burns fuel for nothing.
Plan your trips: Combining errands into a single outing, using a navigation app to avoid congestion and steep routes, and carpooling where possible all reduce the kilometres you cover and the fuel you burn.
“A well-chosen second-hand car, driven sensibly and maintained properly, can take a meaningful amount of pressure off your monthly budget at a time when every litre counts”, Pashut concludes.