Fuel Savings Statistics (2026)
Last updated: July 2026. Figures on this page come from the US Department of Energy (Argonne National Laboratory and fueleconomy.gov), the EIA, ATRI, Verizon Connect, Geotab, Samsara, and INFORMS, and are reviewed and updated annually.
25+ fuel savings statistics for 2026, every figure cited to its original source.
Fuel is one of the few fleet costs a manager can actually move this quarter. Trucks and vans burn it whether they're delivering revenue or sitting at a curb with the engine running, and the gap between an efficient fleet and a wasteful one shows up directly on the P&L. Based on ATRI's 2024 operational cost data, fuel alone runs roughly $0.481 per mile for trucking fleets, about a fifth of the total cost of keeping a truck on the road.
This page collects the numbers behind that opportunity: how much fuel idling actually wastes (the Department of Energy's answer is measured in billions of gallons), what speeding and aggressive driving cost per gallon, where diesel and gasoline prices sit in mid-2026, and what fuel savings GPS-tracked fleets report in practice. It's the deep-dive companion to our full GPS tracking statistics roundup.
Every statistic below is cited to its original publisher: government sources like the DOE's Alternative Fuels Data Center and the EIA, industry research from ATRI, and measured customer results published by Verizon Connect, Geotab, and Samsara.
How Much Fuel Does Idling Waste?
Idling is the purest form of fuel waste: zero miles traveled, fuel still burning. The Department of Energy has studied it for decades through Argonne National Laboratory, and the totals are larger than most fleet managers expect.
More than 6 billion gallons of gasoline and diesel are wasted to vehicle idling in the US every year. That's the DOE's current estimate across personal, commercial, and heavy-duty vehicles combined. For fleets, the takeaway is simple: a meaningful slice of the national fuel bill buys zero movement.
Source: US DOE AFDC / Argonne, Idle Reduction Benefits
Idling waste adds up to more than $11 billion annually, even priced at just $2 per gallon. Argonne's landmark math used a $2/gallon assumption; at July 2026 pump prices, the real dollar figure is far higher. Idle time is one of the first things GPS tracking reports surface, which is why it's usually the first savings lever fleets pull.
Source: US DOE AFDC / Argonne, Idle Reduction Benefits
Over 1 million long-haul heavy-duty trucks idle during required rest stops, consuming more than 1 billion gallons of fuel per year. Rest-period idling for cab comfort is a structural cost in long-haul trucking, and it's why idle-reduction technology gets its own DOE program. Even fleets that can't eliminate rest-stop idling can measure and manage it.
Source: US DOE AFDC / Argonne, Idle Reduction Benefits
Idling a light vehicle burns a quarter to a half gallon of fuel per hour. Per DOE guidance, that works out to roughly $0.02-$0.03 per minute with the AC off and $0.03-$0.05 per minute with it on. For a service fleet of vans and pickups, minutes of curbside idling multiply across every vehicle, every stop, every day.
Source: US DOE, fueleconomy.gov, Driving More Efficiently
Transportation accounts for roughly 70% of US petroleum consumption. That context matters: fuel efficiency isn't a niche fleet concern, it's the dominant use of petroleum in the country. Any percentage-point improvement a fleet makes lands on the single biggest category of national fuel demand.
Source: US DOE Alternative Fuels Data Center
What Does Driving Behavior Cost in Fuel?
After idling, the second-biggest controllable fuel variable is how vehicles are driven. The DOE publishes specific, testable numbers on speed, aggressive driving, and driver feedback, and they're worth memorizing.
Every 5 mph driven over 50 mph is like paying an extra $0.29 per gallon. Aerodynamic drag rises sharply with speed, so highway speeding functions as a self-imposed fuel surcharge. A driver cruising at 70 instead of 55 is effectively paying a premium on every gallon, per current DOE guidance.
Source: US DOE, fueleconomy.gov, Driving More Efficiently
Aggressive driving lowers fuel economy by roughly 15-30% at highway speeds and 10-40% in stop-and-go traffic. Hard acceleration and hard braking are the two behaviors GPS telematics flags most often, and the DOE's ranges show why: in urban duty cycles, an aggressive driver can burn up to 40% more fuel over the same route.
Source: US DOE, fueleconomy.gov, Driving More Efficiently
In-vehicle driver feedback devices improve fuel economy about 3% on average, and about 10% when used actively. This is the DOE's own measurement of what happens when drivers can see their behavior scored in real time. The 3-to-10-point spread is essentially the difference between installing telematics and actually coaching with it.
Source: US DOE, fueleconomy.gov, Driving More Efficiently
DOE fuel-waste math at a glance
| Behavior or factor | Fuel impact (DOE figures) |
|---|---|
| Each 5 mph over 50 mph | Equivalent to paying an extra $0.29 per gallon |
| Aggressive driving, highway speeds | ~15-30% lower fuel economy |
| Aggressive driving, stop-and-go traffic | ~10-40% lower fuel economy |
| Idling a light vehicle | 1/4 to 1/2 gallon per hour ($0.02-$0.05 per minute) |
| Driver feedback device | ~3% better fuel economy on average, ~10% used actively |
| US idling waste, all vehicles | 6+ billion gallons and $11+ billion per year (at $2/gal) |
Sources: US DOE, fueleconomy.gov; US DOE AFDC / Argonne
Related: Fleet management statistics
Where Are Fuel Prices in Mid-2026?
Every waste percentage on this page converts to dollars through the price at the pump, and in 2026 that conversion rate has moved against fleets. The EIA's weekly survey is the standard reference.
US on-highway diesel averaged $4.578 per gallon the week of July 6, 2026, up from $3.739 a year earlier. That's an increase of more than 80 cents per gallon in twelve months. Every idle hour and every over-speed mile costs meaningfully more than it did in July 2025. (The EIA figure is a weekly series, so check the current week's number when budgeting.)
Source: EIA, Gasoline and Diesel Fuel Update (July 2026)
Regular gasoline averaged $3.777 per gallon in the same early-July 2026 EIA reading. For service fleets running gasoline vans and pickups rather than diesel trucks, the per-gallon math on idling and aggressive driving applies at this price point instead.
Source: EIA, Gasoline and Diesel Fuel Update (July 2026)
Fuel cost trucking fleets roughly $0.481 per mile in 2024, about 21% of the $2.260-per-mile total operating cost. Based on ATRI's operational cost data, fuel is one of the largest single line items in trucking, second only to the combined driver compensation package. A fleet that trims fuel burn by even a few percent moves its total cost per mile in a way few other levers can.
Source: ATRI, An Analysis of the Operational Costs of Trucking: 2025 Update
How Much Fuel Do GPS-Tracked Fleets Actually Save?
The DOE numbers above describe the size of the waste. The figures in this section describe what happens when fleets measure it. These are reported and published results from telematics providers' customer bases, ranging from broad user surveys to named case studies.
Average fuel savings reported by GPS fleet tracking users doubled from 8% in 2021 to 16% in 2025. Verizon Connect's annual fleet technology survey shows reported fuel savings climbing steadily as fleets get better at acting on idle and driver-behavior data, not just collecting it. A 16% cut against a five-figure annual fuel bill is a material number for any fleet.
Source: Verizon Connect, 2025 Fleet Technology Trends Report
Fleets using data-driven idle strategies cut idling by up to 30%, per Geotab's 2025 sustainability data. Geotab's flagship example: construction-materials fleet Tarmac reduced idling 30% in three months and improved fuel economy 25%. The pattern is consistent across the report; idle time drops fastest when someone is watching it.
Source: Geotab, 2025 Sustainability and Impact Report (2026)
Transit operator Autolinee Federico cut fuel consumption 20% through driving-style monitoring. This Geotab case is notable because it's a bus operator on fixed routes: the routes didn't change, only the driving did. It's a clean demonstration that behavior coaching alone, without route optimization, can produce double-digit fuel savings.
Source: Geotab, 2025 Sustainability and Impact Report (2026)
Samsara customers collectively saved 261.7 million gallons of fuel in 2025. That single-year total, aggregated across one telematics platform's connected fleets, is a useful sanity check on the survey percentages above: measured at scale, GPS-driven fuel programs save fuel in the hundreds of millions of gallons.
Source: Samsara, 2025 Year in Review (2026)
UPS's ORION route optimization system saved the company more than $320 million by the end of 2015. At full deployment, UPS projected $300-400 million in annual savings, about 10 million gallons of fuel per year, and a 100,000-metric-ton cut in CO2 emissions. A decade later, ORION remains the landmark proof that optimized routing converts directly into fuel.
Source: INFORMS, UPS ORION O.R. Success Story (2016)
Measured GPS and telematics fuel results
| Program / fleet | Reported result | Period |
|---|---|---|
| Verizon Connect user survey | Average reported fuel savings rose from 8% to 16% | 2021 → 2025 |
| Tarmac (Geotab) | Idling cut 30% in 3 months; fuel economy up 25% | 2025 |
| Autolinee Federico (Geotab) | Fuel consumption cut 20% via driving-style monitoring | 2025 |
| Samsara connected fleets | 261.7 million gallons of fuel saved collectively | 2025 |
| UPS ORION | $320M+ saved by end of 2015; ~10M gallons/year projected at full deployment | 2015-2016 |
Sources: Verizon Connect; Geotab; Samsara; INFORMS
The common thread across these results is visibility. Idle reports, speed alerts, and route data turn the DOE's waste percentages into specific vehicles, drivers, and stops a manager can act on. That's the core use case for GPS fleet tracking systems, and it's why fuel is usually the first line item where tracking pays for itself.
Related: GPS tracking ROI statistics · How GPS tracking reduces fuel consumption
Frequently Asked Questions
How much fuel does idling waste in the US?
More than 6 billion gallons of gasoline and diesel per year, according to the US Department of Energy and Argonne National Laboratory. Argonne valued that waste at over $11 billion annually even at an assumed $2 per gallon, so the real cost at 2026 prices is substantially higher.
How much does speeding cost in fuel?
Per DOE guidance on fueleconomy.gov, every 5 mph driven over 50 mph is like paying an extra $0.29 per gallon. Aggressive driving overall lowers fuel economy roughly 15-30% at highway speeds and 10-40% in stop-and-go traffic, which is why speed and harsh-event alerts are core telematics features.
How much fuel can GPS tracking save a fleet?
GPS fleet tracking users reported average fuel savings of 16% in Verizon Connect's 2025 Fleet Technology Trends survey, double the 8% reported in 2021. The DOE separately finds driver feedback devices improve fuel economy about 3% on average and around 10% when drivers actively use them.
Does cutting idle time actually work?
Yes, and it's measurable. Geotab's 2025 Sustainability and Impact Report found fleets using data-driven strategies cut idling by up to 30%. Its case-study fleet Tarmac reduced idling 30% in three months and improved fuel economy 25%, while transit operator Autolinee Federico cut fuel use 20% through driving-style monitoring.
What do diesel and gasoline cost in July 2026?
The EIA's weekly survey put US on-highway diesel at an average of $4.578 per gallon the week of July 6, 2026, up from $3.739 a year earlier. Regular gasoline averaged $3.777. Because it's a weekly series, check the EIA's current update before locking a fuel budget.
What share of a truck's operating cost is fuel?
Based on ATRI's 2025 Update on trucking operational costs, fuel ran roughly $0.481 per mile in 2024, about 21% of the total marginal cost of $2.260 per mile. That makes fuel one of the largest controllable line items in a trucking budget.
See also: our full GPS tracking statistics roundup · Fleet management statistics
Sources & Methodology
All statistics on this page were verified against their original publishers in July 2026 and are reviewed annually. Government figures come from the US Department of Energy (Argonne National Laboratory's idle-reduction research and fueleconomy.gov) and the EIA's weekly fuel price survey. Industry figures come from ATRI's annual operational cost research and from published telematics results by Verizon Connect, Geotab, Samsara, and INFORMS. Where a figure is derived from a source's underlying data (such as fuel's share of ATRI's cost per mile), we label it as based on that source's data. Dollar valuations keep their original-year assumptions, noted in the text.
- US DOE Alternative Fuels Data Center / Argonne National Laboratory, Idle Reduction Benefits
- US DOE, fueleconomy.gov, Driving More Efficiently
- EIA, Gasoline and Diesel Fuel Update
- ATRI, An Analysis of the Operational Costs of Trucking: 2025 Update
- Verizon Connect, 2025 Fleet Technology Trends Report
- Geotab, 2025 Sustainability and Impact Report
- Samsara, 2025 Year in Review
- INFORMS, UPS ORION Success Story