How a vehicle tracking device reduces fleet fuel costs in South Africa

Ask any South African fleet manager what keeps them up at night, and fuel costs will be near the top of the list.

Fuel represents 30 to 40 percent of total operating costs for most logistics and transport businesses in South Africa. That figure has climbed steadily over the years, and the April 2026 diesel price increase of R7.37 per litre placed unprecedented pressure on margins already stretched thin by load shedding, rising tolls, and driver shortages.

Most fleet managers respond to fuel cost spikes the same way; they absorb the hit, look for route shortcuts, or pass costs on to customers. Very few look at what’s happening inside the fleet itself.

That’s where a vehicle tracking device changes the equation. A Netstar car tracking device doesn’t just tell you where your vehicles are. It tells you what your drivers are doing, which routes they’re taking, how long engines are idling, and whether vehicles are being used in ways you haven’t authorised. Every one of those data points is a fuel cost you can act on.

Why fuel is the cost that most South African fleet manager's underestimate

It’s easy to focus on the per-litre pump price because it’s visible and it changes every month. What’s harder to see is how much fuel your fleet wastes unnecessarily - fuel consumption that could be eliminated with better route planning and driver coaching.

Industry data consistently shows that a significant proportion of fleet fuel consumption comes from four preventable sources: drivers taking longer routes than necessary, engines running while vehicles are stationary, aggressive acceleration and braking habits, and vehicles being used outside authorised hours or routes. None of these show up on a fuel invoice. All of them show up on a Netstar vehicle tracking device dashboard.

Before a fleet can cut fuel costs meaningfully, it needs visibility. And visibility starts with a telematics device connected to a real-time management platform.

Netstar’s fleet tracking and management solutions give fleet managers the live data they need to see exactly where fuel is being consumed, which vehicles are the worst offenders, and what behavioural or operational changes will have the most impact.

Five ways a vehicle tracking device reduces fuel costs

1. Route optimisation: cutting kilometres before they’re driven

The single most direct way a vehicle tracking device reduces fuel costs is by showing your drivers the most efficient route and confirming they’re using it.

Without route tracking, drivers make their own decisions about how to get from A to B. Some are sensible. Others add unnecessary kilometres, avoid certain roads for personal convenience, or take detours that made sense once and became habits. Every additional kilometre driven is fuel spent that didn’t need to be.

A Netstar car tracking device logs every trip in real time, allowing fleet managers to compare actual routes driven against planned routes. Deviations are visible immediately. Over time, the data builds a picture of which routes are most efficient for which vehicle types, which drivers consistently add distance, and where route planning can be tightened.

For fleets travelling significant daily distances, a 5% reduction in unnecessary kilometres driven can typically deliver a similar reduction in fuel consumption, provided vehicle utilisation and driving behaviour remain consistent.

Netstar’s fleet intelligence service takes this further, using historical trip data to identify patterns and recommend optimised routes across your entire fleet operation.

2. Driver behaviour monitoring: the fuel cost hidden in driving style

Two drivers covering the same route in the same vehicle can produce dramatically different fuel consumption figures. The difference is driving style.

Hard acceleration, excessive speed, late braking, and cornering at pace all increase fuel consumption significantly. These behaviours are invisible to a fleet manager without a vehicle tracking device. With one, they’re recorded on every trip and available for review and coaching.

Netstar’s car tracking device records driving events including harsh acceleration, harsh braking, and speeding and assigns driver scores based on observed behaviour. Fleet managers can see which drivers are consistently underperforming, identify the specific habits that are costing the most fuel, and intervene with targeted coaching rather than blanket policies.

Driver behaviour improvement has one of the highest fuel-saving returns of any fleet management intervention. Drivers who know their behaviour is being monitored tend to adjust naturally. Those who receive direct coaching improve faster and sustain the improvement longer.

Netstar’s Speed Assist adds an additional layer to this, allowing fleet managers to set speed thresholds for individual vehicles or vehicle classes and receive alerts when those thresholds are exceeded. Driving at appropriate speeds is one of the most consistent and measurable fuel-saving measures available to any fleet.

3. Idle time reduction: the fuel that burns without moving

Idling is one of the most wasteful and least visible fuel costs in any fleet. An idling diesel engine consumes fuel continuously while producing no productive output - no kilometres covered, no deliveries made, no revenue generated.

Idling happens for many reasons: drivers waiting for customers, keeping the cab cool during a break, running accessories without the vehicle moving, or simply leaving the engine running out of habit. In a large fleet, aggregate idle time across all vehicles can represent a substantial proportion of total fuel spend.

A Netstar telematics device logs idle time on every trip. Fleet managers can see total idle time per vehicle, per driver, and per day - and set alerts when idle time exceeds a defined threshold. Addressing idle time consistently across a fleet of even modest size can produce meaningful fuel savings month on month.

4. Geofencing: preventing fuel consumption you didn’t authorise

Geofencing uses virtual boundaries to monitor where your vehicles are and alert you when they move outside approved areas. For fuel management, it serves two important functions.

The first is preventing unauthorised use. When a vehicle is used outside its approved operating hours or outside its designated territory, that usage generates fuel costs the fleet budget never accounted for. A Netstar car tracking device with geofencing alerts the fleet manager the moment a vehicle moves outside a designated boundary or activates outside approved hours. The unauthorised trip is visible before it becomes a significant cost.

The second function is keeping drivers on efficient routes. Route fences, one of the four geofence types available through Netstar’s platform - confine vehicle movement to pre-approved paths. Any deviation triggers an alert, allowing the fleet manager to intervene before unnecessary kilometres accumulate.

For a deeper understanding of how geofencing works and how to set it up across your fleet, read Netstar’s guide to fleet tracking and management.

5. Fuel theft and unauthorised vehicle use prevention

Fuel theft is a real and underreported problem in South African fleets. It takes several forms: fuel purchased on a fleet card that never goes into a fleet vehicle, private mileage on a company vehicle, or direct siphoning from fuel tanks at depots.

A Netstar vehicle tracking device makes fuel theft significantly harder to conceal. When every trip is logged, start time, end time, distance, route, and driver - it becomes straightforward to identify discrepancies between fuel purchases and actual vehicle usage. A refuel event that doesn’t correlate with a logged trip raises an immediate flag.

Private mileage is similarly visible. If a vehicle is used outside its authorised schedule or outside its designated area, the vehicle tracking device records it. Fleet managers can set after-hours alerts that trigger the moment a vehicle moves when it shouldn’t.

This layer of fuel theft protection works alongside Netstar’s vehicle theft protection capabilities. A car tracking device that prevents the vehicle from being stolen entirely through geofencing, alerts, and Netstar’s fleet intelligence service - eliminates the catastrophic fuel and operational cost of losing a vehicle entirely.

Beyond fuel: how a car tracking device protects the full cost of your fleet

Fuel is the biggest variable cost in most South African fleets, but it’s not the only one a vehicle tracking device helps manage.

Vehicle theft is the most dramatic single cost a fleet can face. Losing a vehicle to theft doesn’t just mean a replacement cost it means lost operational capacity, insurance disruption, and the administrative burden of a police case and claim process. Netstar’s car tracking device with 24/7 monitoring and dedicated recovery teams means that when vehicle theft does occur, the response is immediate.

Netstar’s AI camera solutions add another cost protection layer, capturing dashcam footage of incidents, accidents, and near-misses that would otherwise become disputed claims. When the record of an event is clear, claims settle faster and fraudulent cash-for-crash attempts are identified before they become expensive problems.

For fleets carrying goods or towing trailers, Netstar’s trailer manager extends all these protections to trailers and cargo. Cargo theft in South Africa’s logistics sector is a significant and growing cost. Tracking the load, not just the vehicle, closes the protection gap.

For organisations looking to unlock more value from their vehicle data, Netstar’s Data as a Service (DaaS) makes vehicle and mobility data available for use beyond the Netstar platform. Whether it's enriching customer experiences, supporting risk and insurance models, improving operational visibility, or enabling new data-driven products and services, DaaS helps businesses turn connected vehicle data into measurable business outcomes.

Which Netstar solutions are right for your fleet?

Netstar offers fleet tracking and management solutions scaled for every fleet size and operational need.

For smaller fleets and growing businesses

• Small fleet tracking - Affordable, accessible vehicle tracking device technology for fleets of any size, with real-time location, driver behaviour monitoring, and fuel management data.
• Speed Assist - Speed threshold management and alerts to reduce speeding-related fuel waste and driver incident risk.

For larger operations and specialist fleets

• Fleet tracking and management - Comprehensive real-time visibility, geofencing, route management, and driver behaviour monitoring across every vehicle.
• Fleet intelligence service - Predictive analytics, crime-pattern intelligence, and performance benchmarking for data-driven operational decisions.
• AI camera solutions - In-cab and external cameras with AI detection, incident recording, and driver safety scoring.
• Data as a Service - Structured fleet data delivered directly into your business systems for sustained performance improvement.
• Trailer manager - Dedicated tracking for trailers and cargo to close the gap between vehicle and load protection.
• Mining fleet solutions - Specialised vehicle tracking device solutions for high-risk, high-value mining environments.

Adding your fleet to Netstar

Fleet customers can add vehicles to their account by contacting 011 207 5335 or emailing fleetcs@netstar.co.za. For upgrade requests, contact the fleet team at fleetleads@netstar.co.za. To speak to someone about signing up, call Netstar’s sales department on 011 207 5005.

Start reducing your fleet fuel costs with Netstar

South Africa’s fuel costs aren’t going to stop rising. But the proportion of your fleet’s fuel budget that is wasted on preventable consumption is something you can control - starting with a vehicle tracking device that shows you exactly where the waste is happening.

Netstar’s car tracking device and fleet management platform give you the visibility, the data, and the tools to turn fuel cost management from a reactive scramble into a proactive operational discipline.

Fleet tracking and management | Fleet intelligence service | Small fleet tracking | Got questions? Visit our FAQ

Frequently asked questions about vehicle tracking devices and fleet fuel costs

How does a vehicle tracking device reduce fuel costs?

A vehicle tracking device reduces fuel costs in five main ways: by enabling route optimisation to cut unnecessary kilometres, by monitoring driver behaviour to identify fuel-wasting habits such as speeding and harsh acceleration, by logging idle time so fleet managers can address engines running unnecessarily, by using geofencing to prevent unauthorised vehicle use, and by making fuel theft visible through trip-by-trip correlation of fuel purchases and actual vehicle activity.

What percentage of fleet operating costs in South Africa is fuel?

For most South African logistics and transport fleet businesses, fuel represents 30 to 40 percent of total operating costs. During periods of high fuel prices, this proportion can climb higher, particularly for diesel-dependent long-haul and heavy commercial vehicle fleets. Managing fuel consumption through a vehicle tracking device is one of the most direct ways to protect operating margins in this environment.

Can a car tracking device help prevent fuel theft in a fleet?

Yes. A Netstar car tracking device logs every trip with full detail start and end time, distance, route, and driver. Fleet managers can compare fuel card purchases against logged trip data to identify discrepancies. After-hours movement alerts make unauthorised vehicle use visible immediately. These features together make fuel theft significantly harder to conceal and easier to investigate when it does occur.

How does geofencing help manage fleet fuel costs?

Geofencing creates virtual boundaries around approved areas and routes. When a vehicle moves outside a designated boundary or uses a route that hasn’t been authorised, the fleet manager receives an alert. This prevents unauthorised journeys that generate fuel costs outside the operating budget, keeps drivers on efficient pre-approved routes, and makes after-hours vehicle use immediately visible.

What should I do if my fleet vehicle is stolen?

Call Netstar’s 24/7 emergency line immediately on 0800 11 22 22. This connects you directly to Netstar’s Emergency Department, who will activate your vehicle tracking device and deploy recovery teams. Report the theft to SAPS at the station nearest to where the vehicle was taken and notify your insurer with your SAPS case number. Fleet customers can also contact the fleet support team on 011 207 5335 for assistance.

In Summary

Fuel represents 30 to 40 percent of total operating costs for most South African fleet businesses and those costs rose further when diesel jumped by R7.37 per litre in April 2026. A vehicle tracking device doesn’t just protect against vehicle theft. It actively reduces fuel consumption through route optimisation, driver behaviour monitoring, idle time alerts, geofencing, and unauthorised vehicle use prevention. This article explains the five keyways Netstar’s car tracking device and fleet management platform help South African businesses bring their fuel bill under control and how to get started.

Netstar is an operating company within the Altron Group and an industry-leading provider of vehicle tracking, recovery, and fleet management solutions across South Africa