School bus and transit fleets

Same route, same stops, every single day

A bus fleet is the most predictable duty cycle in heavy diesel. Fixed routes, uniform vehicles, and a transportation budget that has to hold through the school year. That makes the savings measurable and repeatable, and it makes the cost a fixed line item.

2.6–3.8%

Monthly fuel reduction

Conservative estimate for bus fleet duty cycles

~30 min

Install per bus

Done in your lot between runs or overnight

$50

Per bus / per month

Flat, five-year lock, budgets as a fixed line

Zero

Hardware

Nothing added to the bus, nothing to maintain

Worked example

What a district fleet saves in a year

Built on 1,100 gallons per bus per month and $5.35 per gallon (U.S. average diesel, EIA weekly, June 2026). Replace both with your district's own figures in the calculator below.

Annual fuel savings by fleet size

Low end at 2.6% reduction, high end at 3.8%, before the EOS fee

At 2.6% reductionAdditional at 3.8%

A 188-bus district sits between $345,000 and $505,000 a year in avoided fuel spend, against an EOS cost of $112,800 a year.

Fleet size	Monthly fuel spend	Gallons saved, low	Gallons saved, high	Monthly savings, low	Monthly savings, high	Annual savings range
25 buses	$147,125	715	1,045	$3,825	$5,591	$45,900 – $67,090
50 buses	$294,250	1,430	2,090	$7,651	$11,182	$91,810 – $134,180
100 buses	$588,500	2,860	4,180	$15,301	$22,363	$183,610 – $268,360
188 buses	$1,106,380	5,377	7,861	$28,765	$42,052	$345,180 – $504,624

Calculated at 1,100 gallons per bus per month and $5.35 per gallon. Actual results vary by route, load, idle time, and engine configuration, and are confirmed against the district's own baseline during the pilot.

Run your own numbers

School bus savings calculator

Nothing added to the bus

No box, no antenna, no wiring, no drilling. The map loads onto the ECU the bus already has. Nothing for a mechanic to service and nothing for an inspector to question.

Budgets as a fixed line

$50 per bus per month, locked five years. A 50-bus district is $30,000 a year, flat, against a savings range that starts near $92,000. No escalators to defend at the next board meeting.

Emissions untouched

DPF, SCR, DEF, and EGR are left on the factory strategy. The calibration stays inside OEM limits. See the warranty position.

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.

Email rsmith@eosfuelsystems.com

(317) 970-3904

EOS Fuel Management Systems
12175 Visionary Way, Fishers, Indiana 46038