Why fuel data matters
For many fleets, fuel is the single biggest running cost after salaries. Because vehicles are away from the depot, it is hard to verify what was actually used. Continuous monitoring turns fuel from an estimate into a measurable number.
1. Sudden drops while the vehicle is parked
A fall in tank level when the engine is off and the vehicle is stationary is the clearest red flag. It deserves immediate review, ideally with an alert sent to a supervisor.
2. Refills that do not match receipts
Compare fuel added according to sensors with the quantities on bills. Large or repeated differences are worth investigating.
3. Consumption that differs sharply between similar vehicles
Two similar vehicles on similar routes should have similar mileage. A persistent gap may mean a mechanical problem, poor driving habits or fuel loss.
4. Long idling
Engines running while stationary burn fuel with no progress. Idling reports show where policy or driver training can save money.
5. Fuel events outside planned routes or hours
Geofencing and time-based rules help flag fuel activity in unexpected places or at unusual times.
What to do next
Start by measuring. Once you have trustworthy data, set simple alert rules and review exceptions weekly. Over time the numbers also support predictive maintenance and better route planning.