Driving a Diesel? Fuel Saving Tips for Your Nissan Navara in SA
Filling a double cab has become a scary experience, with pump prices at an all-time high. Drivers of diesel vehicles are looking at every possible way to save on fuel. These are AutoTrader's top tips for the Nissan Navara.
Let’s face it—filling up a double-cab bakkie in South Africa isn't the lighthearted affair it used to be. Whether you're navigating the stop-and-go madness of the N1 in Johannesburg, sitting in crawl-pace traffic on Cape Town's N2, or hauling heavy gear across the corrugated gravel routes of the Bushveld, fuel costs eat into your monthly budget faster than a stray dog on a fallen braai chop.
Related: Peugeot Landtrek vs Mitsubishi Triton vs Nissan Navara: Which one has the lowest running costs?
The Nissan Navara, especially since the locally produced, heavy-duty facelift landed from Nissan’s Rosslyn plant, is a formidable machine. Known for its tough ladder-frame chassis, multi-link coil-spring rear suspension, and workhorse 2.5-litre DDTi and older 2.3-litre twin-turbo oil burners, it balances daily commuting comfort with serious off-road grunt. However, pushing a two-ton brick through the South African air requires skilful driving to maintain reasonable fuel economy. If you want to stretch every litre of 50ppm diesel to the absolute limit, here is your definitive guide to squeezing maximum range out of your Nissan Navara.
Chery South Africa to Take Over Nissan’s Rosslyn Plant: What You Need to Know
1. Master the torque curve
Modern diesel engines don't reward high revs; they reward low-end torque. The 2.5-litre turbocharged diesel engine found in current SA-spec Navaras develops up to 450 Nm of peak torque on higher-spec variants between 1 500 and 2 500 r/min.
Shift early in manuals: If you’re driving a 6-speed manual, there is zero benefit to ringing out the engine past 2 500 r/min. Shift up early and let the turbo boost do the heavy lifting.
Be gentle with the 7-speed auto: If you're running the automatic, avoid floor-board acceleration that forces two-gear downshifts. Smooth, progressive pressure on the throttle keeps the transmission in high gear, where the torque keeps you moving efficiently.
2. Speed limits and aerodynamics
South Africa’s open highways invite long-distance cruising, but wind resistance rises exponentially the faster you go. Because your Navara has the aerodynamic profile of a small mountain, driving at 120 km/h or higher forces the turbocharger to work significantly harder.
Dropping your open-road cruising speed from 120 km/h to 100–110 km/h can reduce your fuel consumption by 12%-15%. Set your cruise control on those long stretches along the N3 or N1 and sit back while the fuel savings pile up.
| Speed | Estimated consumption impact | Practical benefit |
| 120+ km/h | High (Baseline) | Saves a few minutes on long trips |
| 110 km/h | Moderate (-8% to -10%) | Excellent balance of time and economy |
| 100 km/h | Optimal (-12% to -15%) | Maximum range per tank on open highways |
3. Shed the unnecessary weight
It’s easy to treat the load bin of a bakkie like a permanent storage locker. However, carrying an extra 50 to 100 kg of unused camping gear, recovery straps, toolboxes, or bags of cement through city streets reduces your fuel economy during stop-start driving.
Clear out the bin: Unload heavy gear after weekend tasks or bush trips.
Mind your accessories: That heavy-duty steel replacement bumper, winch, rooftop tent, and chunky roof rack might look tough at the local outdoor store, but they add significant drag and mass. If you don't need the rooftop tent fitted for your daily commute, take it off until holiday time.
4. Keep an eye on tyre pressures
Running under-inflated all-terrain (A/T) or mud-terrain (M/T) tyres increases rolling resistance, forcing the engine to burn extra diesel just to keep the wheels turning.
Check your tyre pressures at least once every two weeks, while the tyres are cool. Follow the manufacturer's recommended bar settings found on the driver-side door jamb.
On tarmac: Keep pressures at the recommended spec (usually around 2.1-2.4 bar unladen, depending on your model).
After off-roading: If you deflate your tyres for sand driving in Mozambique or rocks in the Drakensberg, remember to pump them back up as soon as you hit the bitumen!
5. Don't ignore maintenance
South African diesel quality varies, and dirt or water in your fuel system is a quick way to ruin efficiency. Modern common-rail diesel injectors operate under massive pressures, requiring squeaky-clean fuel delivery to atomise diesel correctly.
Use quality 50ppm diesel: Stick to reputable fuel stations offering low-sulfur 50ppm diesel (or 10ppm where available) to protect your fuel injectors and catalytic converter.
Service air and fuel filters: A clogged air filter starves the engine of oxygen, skewing the air-fuel mixture and increasing diesel burn. Ensure your air and fuel filters are changed on schedule according to your service plan.
Clear out the DPF: If your Navara does primarily short, low-speed city runs, take it on a sustained 30-minute highway run once a month. This allows the exhaust system to reach high enough temperatures to clean out carbon buildup in the diesel particulate filter.
In closing
The Nissan Navara is built for rugged South African conditions. It’s tough, capable, and remarkably comfortable. By making small shifts in how you drive and staying on top of maintenance, you don't have to sacrifice performance to see noticeably better figures on your trip computer. Shift early, drop your cruising speed slightly, keep your tyres inflated, and let the Navara’s torque do what it does best!
