Choosing the right fuel monitoring solution can help fleet operators track fuel levels, understand consumption, verify refuelling and identify abnormal fuel loss.
For businesses using a fleet management system in the UAE or managing vehicles across multiple locations, selecting the right technology also helps bring fuel data, vehicle activity and operational information into one system. The best option depends on vehicle type, model year, available vehicle data, required accuracy, installation requirements and fleet operating conditions.
What Are the Main Fuel Monitoring Challenges?
Fuel monitoring becomes particularly important for businesses operating trucks and other vehicles with large fuel tanks. However, managing fuel data across a fleet is not always straightforward.
A single fleet may include older trucks that have been in service for many years alongside newer vehicles that are five or ten years old. Different vehicle models and generations can provide different types of fuel-related data, which means one monitoring method may not work equally well across the entire fleet.
A modern fleet management system can help fleet operators combine fuel information with GPS tracking, driver activity and vehicle performance data. This creates a broader view of how vehicles are being used and where operational inefficiencies may occur.
Fleet telematics systems generally use three approaches to monitor fuel:
- OBD-based fuel monitoring
- CAN bus fuel monitoring
- Dedicated fuel level sensors
The key question, therefore, is not simply which fuel monitoring solution is best, but which solution is most suitable for each vehicle type and model in the fleet.
What Is the Difference Between Fuel Level, Fuel Usage and Fuel Consumption?
Understanding fuel monitoring terminology is important before comparing different technologies.
Fuel Level Monitoring
Fuel level monitoring measures how much fuel is currently available in the vehicle’s tank. The reading is usually shown in litres or as a percentage of the tank’s capacity.
Fuel Usage Monitoring
Fuel usage monitoring tracks the amount of fuel used during a journey, operating period or specific time interval.
Fuel Consumption Monitoring
Fuel consumption monitoring measures how efficiently fuel is being used in relation to vehicle activity. Depending on the application, it may be expressed as litres per 100 kilometres, kilometres per litre or litres per hour.
In simple terms, fuel level tells you how much fuel is in the tank, fuel usage tells you how much fuel has been used, and fuel consumption shows how efficiently that fuel is being used.
What Are the Main Fuel Monitoring Methods?
Telematics-based fuel monitoring generally uses three main methods. The most suitable option depends on the vehicle type, model year, available onboard data and required measurement accuracy.
1. Fuel Monitoring Through an OBD GPS Tracker
An OBD-based solution obtains fuel information through the vehicle’s OBD interface using a compatible GPS tracking device.
The tracker is connected to the vehicle’s OBD-II port and reads available fuel-related information from the vehicle’s electronic systems. It can then transmit this information to the telematics platform along with GPS location and other vehicle data.
In this method, fuel data is obtained from the vehicle’s factory-installed fuel sensors. These sensors may provide information such as current fuel level, recent fuel usage and remaining fuel percentage to the vehicle dashboard.
This method is particularly useful when the vehicle already provides the required fuel parameters through its OBD interface.
Benefits of OBD Fuel Monitoring
Plug-and-play installation:
A compatible OBD tracker can be connected directly to the vehicle’s OBD-II port, reducing installation requirements.
Cost-effective:
Because the system can use fuel information already available from the vehicle, an additional fuel-level sensor may not be necessary.
Vehicle compatibility information:
OBD tracker manufacturers generally provide compatibility information showing which vehicle models and fuel parameters are supported.
Helps preserve vehicle warranty: Since installation does not normally require cutting or modifying the vehicle’s wiring, an OBD tracker is less likely to affect the vehicle warranty. This can make it suitable for applications such as usage-based insurance and secured vehicle leasing.
Limitations of OBD Fuel Monitoring
More suitable for light vehicles:
OBD-based fuel monitoring is generally better suited to compatible modern light vehicles. Older trucks, construction equipment and specialist machinery may not provide the required data.
Driver Abuse: Because the OBD tracker is easily accessible inside the vehicle, it can potentially be unplugged by drivers or thieves. This can make it less suitable for high-risk, cross-border or multi-driver operations unless supported by driver identification or video telematics. The device may also be removed during vehicle maintenance and potentially misplaced.
Fuel data may not be available:
Not every vehicle provides the required fuel parameters through the OBD port, so compatibility must be checked before installation.
2. Fuel Monitoring Using CAN Bus Data
CAN, or Controller Area Network, is the communication network that allows different electronic control units within a vehicle to exchange information.
With CAN-based fuel monitoring, a compatible CAN adapter reads available fuel-related parameters from the vehicle’s CAN bus. The adapter sends this information through the connected telematics device to the fleet management platform.
For organisations using a fleet management system in the UAE, CAN-based monitoring can provide useful vehicle information that can be combined with GPS location, mileage and driver activity data.
Benefits of CAN-Based Fuel Monitoring
Uses existing vehicle data:
The system can access fuel information already generated by the vehicle’s electronic systems, potentially reducing the need for an additional fuel sensor.
Access to multiple parameters:
Depending on the vehicle, CAN data may provide information such as fuel level, fuel consumption, engine hours, mileage and other operating parameters.
Less intrusive than tank sensors:
CAN-based monitoring does not normally require drilling into the fuel tank.
Supports detailed fleet analysis:
Fuel data can be combined with GPS information, mileage and driver activity to analyse fuel efficiency and identify unusual fuel usage.
Limitations of CAN-Based Fuel Monitoring
Compatibility varies:
Different manufacturers and vehicle models can expose different fuel parameters through the CAN bus. Older trucks may not support the required CAN data.
Installation may require professional expertise:
Accessing CAN data can involve vehicle-specific wiring, configuration and technical knowledge.
Accuracy depends on vehicle data:
CAN fuel readings rely on the vehicle’s native sensors and calculations. In some applications, a properly calibrated dedicated fuel sensor may provide more precise measurements.
Potential warranty considerations:
Some installations may involve tapping into vehicle wiring. The installation method should therefore be considered carefully where warranty requirements apply.
3. Fuel Monitoring Using Dedicated Fuel Sensors
Dedicated fuel sensors are installed directly into the vehicle’s fuel tank to measure fuel volume and transmit the readings through a telematics device.
This approach can be particularly useful for heavy trucks, construction equipment, older vehicles and applications where reliable fuel information is not available through OBD or CAN.
Calibration is normally performed by adding measured quantities of fuel, such as 5 or 10 litres at a time, and recording the corresponding sensor readings to create an accurate calibration table for the specific tank.
Benefits of Dedicated Fuel Sensors
High measurement accuracy:
Dedicated fuel sensors can provide highly precise readings. High-end models may offer approximately 1–2% accuracy, making them useful for monitoring gradual fuel loss or unusual changes in fuel levels.
Useful where CAN data is unavailable:
They can provide an alternative for older vehicles and equipment that cannot supply reliable fuel data through the CAN bus.
Suitable for almost any vehicle or equipment: Dedicated sensors can be used across different models of trucks, construction machinery and stationary equipment such as diesel generators. They can also be used for multiple tanks, fuel tankers and submerged fuel tanks.
Helps verify refuelling:
Changes in tank level can be recorded during refuelling, allowing operators to compare actual fuel added with fuel-card or purchase records and investigate discrepancies.
Limitations of Dedicated Fuel Sensors
Professional installation required: Fuel sensors require skilled installation and may involve draining the tank, drilling an opening, installing the sensor and completing calibration and taring. Depending on the fleet, specialised equipment may also be required.
Tank calibration is necessary: Each sensor must be calibrated according to the specific tank’s size, shape and capacity. This adds installation time and complexity, particularly when a fleet contains different tank types or dual tanks.
Tank modification may affect warranty: Probe-type sensors may require drilling into the fuel tank, which can potentially affect the vehicle or tank warranty.
Higher implementation cost: Dedicated fuel monitoring requires additional hardware and labour, including the GPS tracker, fuel sensor, professional installation, calibration and taring.
Most expensive of the three methods: Because of the additional equipment, installation and calibration requirements, dedicated fuel sensors generally have the highest implementation cost among the three monitoring methods.
What Role Does Driver Activity Monitoring Play in Fleet Management?
Fuel monitoring can also be reviewed alongside driver activity monitoring in the UAE data. Combining vehicle movement, mileage, driver activity and fuel information can help fleet managers understand unusual fuel consumption and assess operational patterns.
An advanced driver fleet log system in the UAE can also help organisations maintain digital records of driver activity and fleet operations, particularly when driver and vehicle information needs to be reviewed regularly.
How Can Digital Driver Logs Support Fleet Operations?
A digital driver log in the UAE solution can help organisations maintain centralised digital records of driver and vehicle activity. When integrated with fuel monitoring and telematics data, these records can provide additional operational context.
Which Fuel Monitoring Solution Is Best for Your Fleet?
There is no single fuel monitoring solution that is ideal for every fleet. The right choice depends on the vehicles being monitored and the level of fuel visibility required.
| Fuel Monitoring Method | Best Suited For | Main Advantage | Main Limitation |
| OBD GPS Tracker | Compatible with modern light vehicles | Simple installation | Fuel data may not be available |
| CAN Bus | Compatible vehicles requiring broader telematics data | Uses existing vehicle data | Vehicle compatibility varies |
| Dedicated Fuel Sensor | Trucks, heavy equipment and older vehicles | High measurement accuracy | Higher installation and calibration requirements |
Choose OBD When Simplicity Is the Priority
OBD trackers are generally best suited to modern light vehicles where simplicity and low installation cost are priorities.
Choose CAN When You Need Broader Vehicle Data
CAN-based solutions are suitable for fleets that require access to broader vehicle data and more advanced telematics, provided the required CAN data is available.
Choose Dedicated Fuel Sensors When Accuracy Is Critical
Dedicated fuel sensors are most suitable for heavy trucks, construction equipment, older vehicles and applications where high accuracy and fuel-theft detection are critical.
What About a Mixed Fleet?
For mixed fleets, the best approach may be to use different monitoring methods for different vehicle groups rather than applying one solution across the entire fleet.
What Should You Consider Before Choosing a Fleet Management System?
Fuel monitoring is only one part of modern fleet operations. When selecting a fleet management system, businesses should consider how well the platform supports their wider operational requirements.
Before selecting a solution, fleet operators should evaluate:
- Vehicle type and age: Older trucks and specialist equipment may have fewer onboard data options.
- OBD compatibility: Check whether the vehicle provides the required fuel parameters through its OBD port.
- CAN data availability: Confirm which fuel-related parameters are accessible through the vehicle’s CAN system.
- Required accuracy: Determine whether basic fuel-level information is sufficient or whether more precise measurement is required.
- Driver monitoring: Consider whether driver activity monitoring in the UAE features can help assess driver and vehicle activity.
- Digital driver records: Check whether a digital driver log in the UAE solution can support the organisation’s driver-record requirements.
- Installation requirements: Consider whether professional installation, wiring or tank modification is acceptable.
- Fuel-theft monitoring needs: Higher-risk operations may benefit from more precise fuel-level monitoring.
- Fleet diversity: Mixed fleets may require different monitoring technologies for different vehicle groups.
- Total implementation cost: Consider the tracker, sensors, installation, calibration and maintenance rather than comparing device prices alone.
Frequently Asked Questions
What is fuel monitoring in fleet management?
Fuel monitoring is the process of tracking fuel levels, fuel usage or fuel consumption through vehicle data, telematics devices or dedicated fuel sensors.
Which is better, OBD or CAN fuel monitoring?
Neither is universally better. OBD can be simpler for compatible vehicles, while CAN can provide access to broader vehicle data. The best option depends on vehicle compatibility and the fuel parameters available.
Are dedicated fuel sensors suitable for trucks?
Yes. Dedicated fuel sensors can be particularly useful for trucks, heavy equipment and older vehicles where reliable fuel data is not available through OBD or CAN.
Can fuel monitoring help identify abnormal fuel loss?
Yes. Monitoring changes in fuel levels and comparing them with vehicle activity or refuelling records can help fleet operators identify unusual fuel loss or discrepancies.
Is one fuel monitoring method suitable for an entire fleet?
Not necessarily. Fleets with different vehicle types, ages and technologies may benefit from using different fuel monitoring methods for different vehicle groups.
What is a Driver Fleet Log System?
A driver fleet log system in the UAE is a digital system designed to help fleet operators record, organise and review driver-related activity and operational information. Its suitability depends on the specific features and compliance requirements of the fleet.
Conclusion:
Choosing the right fuel monitoring solution starts with understanding the vehicles in your fleet and the type of fuel data they can provide. OBD monitoring can offer a simple option for compatible light vehicles, CAN-based monitoring can provide broader vehicle data, while dedicated fuel sensors can deliver highly accurate fuel-level information for trucks, heavy equipment and vehicles without suitable onboard data.
For mixed fleets, a combination of monitoring methods may provide the most practical solution. When fuel monitoring is combined with driver activity information, digital driver logs and a suitable fleet management system in the UAE, fleet operators can gain a more complete view of vehicle and driver operations.
Want to improve fuel visibility and fleet operations? Connect with Informap today to explore the right fleet management and telematics solution for your vehicles.
