Software-only fuel calibration for heavy diesel fleets
Cut diesel spend on the routes you already run
EOS is a fuel map that loads onto the engine control unit your truck already has. No parts. No emissions hardware touched. About 30 minutes per vehicle, and the truck goes back to work the same day.
Flat $50 per unit per month, locked for five years. The price does not move when your savings go up.
The test data
Four routes. Every one burned less fuel.
A 6-axle tractor-trailer at 100,000 lb gross was run over an interrupted route and an uninterrupted route, loaded northbound and empty southbound, against control data from the same configuration without EOS.
Controlled route testing on one vehicle configuration. Real-world fleet results are projected conservatively at 2.4% to 3.4% per month and are confirmed against your own baseline before you commit.
How it works
Four steps, start to first report
Fleet assessment
We pull your engine specs, route profiles, and duty cycles and build a baseline fuel model from your own numbers. No cost, no commitment.
Fuel map build
A map is engineered per engine platform, calibrated with test-cell data and real route data from your operation. Not an off-the-shelf tune.
Software install
The map loads onto the ECU through the diagnostic port. No parts, no wiring, no drilling. About 30 minutes. The truck runs its next shift.
Monitor and report
Real-time reporting by vehicle and by route, plus a monthly statement of gallons saved and dollars saved against your baseline.
Your fleet
Built for the duty cycles that burn the most
Waste management and collection
Hundreds of stops a day, packer and hydraulic loads, weight climbing all route. This is where the map earns the most.
See waste management results →
Over the road
Linehaul and regional Class 8. Long hours at cruise, heavy gross weight, and fuel as the largest variable cost on the P&L.
See over-the-road results →
School buses
Fixed routes, uniform fleets, a budget that has to hold. Predictable duty cycles make the savings repeatable.
See school bus numbers →
The question every fleet asks first
It will not void your warranty and it will not hurt your trucks
EOS is a calibration layer that stays inside the manufacturer's own boost, fueling, and torque limits. It does not modify, disable, or bypass DPF, SCR, or EGR, so the certified emissions strategy is unchanged. Your original factory calibration is archived before we write anything and can be restored on request.
Under the federal Magnuson-Moss Warranty Act, the presence of aftermarket software cannot by itself void a warranty. A manufacturer has to prove that a specific modification caused a specific failure.
Read the full warranty positionWhat EOS changes
- Fuel delivery timing and quantity across the load and speed range
- Shift and torque behavior inside factory limits
- Response to grade, weight, and stop-and-go duty cycles
What EOS never touches
- DPF, SCR, DEF dosing, or EGR hardware and function
- Factory boost, fueling, and torque ceilings
- Engine hardware, wiring, or aftertreatment plumbing
- Speed limiter or governor settings you have set
Pricing
$50 per unit, per month. That is the whole price.
Flat rate, per vehicle, no matter what your fleet saves. Locked for five years. If a truck saves $200 a month, you keep $150 of it. If it saves $600, you keep $550. We do not move the goal post and we do not reprice you for performing well.
- No hardware cost, no install fee, no setup charge
- No percentage of savings and no shared-savings contract
- Real-time reporting and monthly savings statements included
- Five-year price lock in writing
Start here
Free fleet assessment
Send us your engine specs, route profiles, and last quarter's fuel numbers. We build the baseline model, tell you what the map should do on your duty cycle, and prove it on a pilot against your own data before you commit to anything.
(317) 970-3904
EOS Fuel Management Systems
12175 Visionary Way, Fishers, Indiana 46038