Fuel is typically 25-35% of fleet operating costs. A 5% improvement in fleet-wide MPG could save serious money for a 10-vehicle fleet running 100,000 miles/year/vehicle, saving $15,000-25,000 annually on diesel prices. In this blog, we have compiled the best tactics from our fleet managers and fuel economy researchers to help you plan better.
Driver behavior is the biggest lever
1. Driver coaching with telematics
Did you come across a situation where it is the same truck, same route, but driver behavior influence 15-25% in fuel economy? This is reason enough to understand why driver coaching is the single highest-impact intervention available.
According to telematics systems (Geotab, Samsara, Verizon Connect, Lytx) report:
- Harsh acceleration events
- Harsh braking events
- Excessive speed
- Idling time
- Cruise control utilization
are some of the biggest blockers in fuel economy. That’s why we recommend combining driving coaching with telematics to correct risky habits, lower insurance cost and improve business ROI.
2. Speed management
Aerodynamic drag increases exponentially with speed. Reducing fleet-wide speed from 70 mph to 65 mph typically saves 5-8% fuel. Many fleets governor their trucks at 65 mph; the small productivity loss is more than offset by fuel savings.
3. Idling reduction
Truck engines idling for cab climate burn 0.8-1.0 gallons/hour. Drivers idling 4+ hours per day burn $4,000-6,000 of fuel per year just idling. Auxiliary Power Units (APUs) and battery-electric HVAC systems pay back in 12-18 months.
Route optimization
4. Route optimization software
Route4Me, OptimoRoute, Onfleet, Trimble Maps are some of the best algorithmic route that assists in reduing empty miles, sequencing inefficiency, and route overlap. This single optimization alone cause typical fuel savings 8-15% in delivery operations.
5. Geofencing and stop verification
Routes that allowed for extra stops or off-route detours lose efficiency. Therefore geofencing is the best strategy to flag off-route activity.
6. Load matching
Empty backhauls are cost driver. Load board access (DAT, Truckstop.com, 123Loadboard) and backhaul partnerships reduce empty miles 5-15%.
Vehicle and maintenance
7. Aerodynamic improvements
- Side skirts: 4-7% fuel savings on tractor-trailers
- Roof fairings (cab top to trailer): 5-10% savings
- Trailer tails: 4-6% savings
- Wheel covers: 1-2% savings
Combined aero improvements can deliver 10-15% fleet-wide fuel savings; payback typically 12-24 months.
8. Low rolling resistance tires
SmartWay-certified tires save 3-5% fuel vs standard tires. Higher upfront cost; long-term savings clear.
9. Tire pressure monitoring
Underinflated tires cost 0.3% MPG per PSI. Across 18 wheels, this compounds. Automatic tire inflation systems (ATIS) maintain pressure continuously.
10. Preventive maintenance
- Clean air filters (clogged filters reduce MPG)
- Engine tune-ups at manufacturer intervals
- Alignment (misalignment can cost 5-10% MPG)
- Diesel particulate filter (DPF) maintenance
Operations and procurement
11. Fuel card programs and volume discounts
Fleet fuel cards (Comdata, EFS, FleetOne) typically save 3-8 cents per gallon below pump price through volume discounts.
12. Fuel network optimization
Truckstops within your fuel network vary significantly in price. Routing to optimize fueling locations saves 2-4 cents per gallon.
13. Bulk fuel for centralized fleets
Fleets returning to a single yard nightly can install bulk diesel storage. Saves 5-15 cents per gallon vs retail.
14. Hedging strategies (large fleets)
Fuel cost hedging through futures or fixed-price contracts. Complex; typically only for fleets above 100 vehicles.
Technology investments
15. Predictive cruise control
Newer trucks have GPS-based predictive cruise (Detroit Connect, Volvo Trucks, etc.) that anticipates hills and manages throttle for fuel efficiency. 3-5% savings on hilly routes.
16. Automated manual transmissions (AMT)
Replace traditional manual transmissions. Better shift timing, less driver-induced variation. 3-5% fuel savings on average.
17. Electric truck consideration
For specific use cases (urban delivery, predictable routes, return-to-base), electric trucks (Volvo VNR Electric, Freightliner eCascadia, BYD Class 8) eliminate fuel costs entirely. Currently economic for some applications, not for long-haul.
Driver incentive programs
18. Pay-for-MPG bonuses
Many fleets pay drivers monthly bonuses based on fleet-relative fuel economy scores. Aligns driver behavior with fleet economics.
19. Recognition and gamification
Leader boards, monthly awards, top-driver recognition and non-monetary motivators really work for many drivers.
What doesn’t work as advertised
- Fuel additives. Most claims unsupported by independent testing.
- Magnets on fuel lines. No scientific basis.
- “Performance chips.” Often void warranties; rarely improve fuel economy meaningfully.
- Aftermarket air intakes. Designed for noise/look, not fuel economy.
The compound math
For a 50-vehicle long-haul fleet running 130,000 miles/year/vehicle at 6.5 MPG average and $4/gallon diesel:
- Current annual fuel cost: 50 × 130,000 / 6.5 × $4 = $4M
- 5% improvement (to 6.83 MPG): Saves $190,000/year
- 10% improvement (to 7.15 MPG): Saves $365,000/year
Driver coaching, combine with speed management, aero and tire pressure can realistically deliver 8-12% improvement. The math justifies investment in nearly every program above.
Conclusion
Driver coaching delivers returns bigger than your imagination. Speed management is essentially free and aerodynamic improvements pay back in 1-2 years. Telematics, fuel cards and route optimization are some important basics to start with. Fuel cost reduction isn’t one big move; it’s 5-10 smaller moves that compound to substantial savings. Since you are already reading this blog, now is the sign for you to consider working with a fleet fuel management consultant for fleets above 25 vehicles.
