Fuel Theft or Inefficiency? How to Tell the Difference

Fuel Is Your Biggest Variable Cost

For most Southern African transport operators, fuel accounts for 30-40% of total operating costs. A fleet of 20 trucks running the Harare–Beitbridge corridor burns through $80,000-120,000 in diesel per month. A 10% variance — whether from theft, inefficiency, or poor driving habits — is $8,000-12,000 per month walking out the door.

The problem is that most operators cannot tell whether they have a fuel problem, let alone whether it is theft or inefficiency. They know fuel costs are high, but they do not know why.

Setting a Baseline

Before you can spot anomalies, you need to know what normal looks like. This requires three data points per trip:

1. **Fuel loaded** — litres added at each fill-up, with receipts or fuel card records 2. **Distance covered** — odometer reading at departure and arrival, or GPS-tracked distance 3. **Load weight** — a fully loaded truck consumes significantly more fuel than an empty one

From these three inputs, you calculate litres per 100 km (L/100km) for each trip. Over time, you build a baseline for each vehicle on each route.

### Typical Baselines for Southern African Corridors

| Route | Loaded (L/100km) | Empty (L/100km) | |-------|-------------------|------------------| | Harare–Beitbridge (tar) | 38-45 | 28-33 | | Harare–Beira (via Mutare) | 42-50 | 30-36 | | Harare–Chirundu (tar) | 36-42 | 27-32 | | Gravel/mine access roads | 50-65 | 35-45 |

These numbers vary by vehicle type, age, load, and driving style. The point is not precision — it is having a number to compare against.

Spotting Anomalies

Once you have a baseline, flag any trip that deviates by more than 15%. A truck that normally does 42 L/100km on the Beira corridor but suddenly reports 55 L/100km needs investigation.

### The Three Usual Causes

**1. Driving behaviour (most common)**

Aggressive driving — hard acceleration, excessive idling, high-speed running — is the single biggest cause of high fuel consumption. A driver who runs at 100 km/h instead of 85 km/h uses 15-20% more fuel. A truck idling for 10 hours at Beitbridge burns 8-12 litres of diesel doing nothing.

This is not theft. It is inefficiency. The solution is driver training and, where possible, speed limiters.

**2. Vehicle condition**

A clogged air filter increases fuel consumption by 10-15%. Under-inflated tyres add 5-8%. A faulty injector can waste 10-20% of fuel. Worn turbochargers, dragging brakes, misaligned wheels — all increase consumption without any fuel leaving the tank illegally.

This is a maintenance problem, not a security problem.

**3. Actual fuel theft**

This is rarer than most operators assume, but it does happen. Common methods: - Siphoning from the tank at overnight stops - Collusion with fuel attendants (attendant records 200 litres, pumps 160, pockets the difference) - Draining fuel into containers at the depot before departure

Signs of theft specifically (vs. inefficiency): sudden one-trip spikes rather than gradual increases, fuel consumption that exceeds what is physically possible for the distance, and patterns that correlate with specific drivers or routes.

What the Data Usually Reveals

In our experience working with Southern African fleet operators, when fuel tracking is implemented properly, the breakdown is roughly:

• **60-70% of excess fuel cost** is driving behaviour and idling
• **20-25%** is vehicle maintenance issues
• **5-15%** is actual theft or fraud

Most operators assume theft is the primary problem. The data almost always shows that driving habits and maintenance are where the real money is lost.

Practical Steps

1. Start tracking fuel per trip — even manually in a spreadsheet is better than nothing 2. Calculate L/100km for every trip and compare against your route baseline 3. Investigate deviations over 15% — start with the vehicle and driving data before assuming theft 4. Implement fuel cards to eliminate cash handling at fuel stops 5. Review idling time — GPS data will show you how many hours trucks sit with engines running

Kyros calculates fuel efficiency per trip automatically when fuel records and odometer data are entered. The system flags anomalies and shows trends per vehicle and per driver, making it straightforward to identify whether a fuel problem is behavioural, mechanical, or something else.