How fleet managers reduce fuel waste and protect budgets

Fuel is already the biggest line item in a fleet budget, and in 2026 it became the most unpredictable. Diesel peaked above $5.80 per gallon in April, freight demand is accelerating as air cargo costs push shippers to the road, and standard telematics reports are still showing fleet averages while the actual waste accumulates in the data they miss.

This white paper breaks down where fuel waste hides, why ECU data finds what GPS estimates miss, and how Zonar’s fleet telematics turn engine-level data into a fuel management strategy that stands up under scrutiny.

• Identify the five places fuel waste hides in any fleet, from idling patterns to fuel misuse.
• Understand why GPS-estimated fuel data falls short for stop-and-go duty cycles.
• Separate necessary idle time from waste using time-stamped, location-specific engine data.
• Coach drivers on throttle behavior with route-level efficiency data pulled from the ECU.
• Connect fault codes and mechanical health trends to measurable fuel economy decline.
• Build a fuel reporting structure that holds up in front of a board, auditor or leadership team.
• Use five essential data inputs to construct a fuel strategy built to absorb price volatility.