Reduce US Fleet Fuel Costs by 7–15% — Permanently
FuelMarble is the only semi-truck and commercial vehicle fuel device verified across 9 independent tests. No DEF interference. No DPF risk. No engine modifications. Installs in under 60 seconds per truck.
Example: Class 8 Semi-Truck
100,000 mi/yr · 6 MPG · 10% saving at $3.80/gal diesel
~$6,300/yr saved per truck
On a one-time investment of $709–$2,127 per truck · Payback in 33–120 days
Verified Under Independent Standards
What Does 7–15% Saving Mean for a US Fleet?
A Class 8 semi-truck running 100,000 miles per year at 6 MPG consumes roughly 16,667 gallons of diesel annually. At $3.80/gallon, that is $63,333 in annual fuel spend per truck — before the saving.
At 7% saving
$4,433/yr
Payback in ~59–175 days
per Class 8 truck
At 10% saving
$6,333/yr
Payback in ~41–123 days
per Class 8 truck
At 15% saving
$9,500/yr
Payback in ~27–82 days
per Class 8 truck
Basis: 100,000 mi/yr · 6 MPG · 16,667 gallons/yr · $3.80/gal diesel. Saving range based on independently verified 7–15% fuel efficiency improvement. Payback range reflects FuelMarble L unit cost ($709–$2,127 depending on class).
The Right Unit for Every Class of US Truck
FuelMarble is sized to match coolant capacity. Mixed fleets from Class 1 pickups to Class 8 semis can be equipped in a single order.
Pickups & Light Vans
Under 10,000 lb
Ford F-150, Ram 1500, Sprinter 2500
Required
1× FuelMarble SMedium Duty Trucks
10,001–26,000 lb
Ford F-650, International MV, Isuzu NPR
Required
1–2× FuelMarble LHeavy Duty Single Axle
26,001–33,000 lb
Kenworth T270, Peterbilt 330, International 4300
Required
2× FuelMarble LSemi-Trucks / Linehaul Tractors
Over 33,000 lb
Peterbilt 389, Kenworth W990, Freightliner Cascadia
Required
2–3× FuelMarble LNot sure which size? Contact us with your truck list and we will confirm the exact configuration.
FuelMarble vs. Other US Fleet Cost Levers
Fuel cards reduce your unit cost. Driver training reduces consumption per mile. Route optimisation reduces total mileage. If you have already done all three and your fleet fuel spend is still above benchmark, the problem is inside the combustion chamber — and none of those three levers can reach it.
| Lever | One-time cost | Annual saving | Ceiling | Compounds? |
|---|---|---|---|---|
| Fuel cards | None | 2–5¢/gal discount | Hit in year 1 | No |
| Driver training | $200–$500/driver | 3–5% consumption reduction | Degrades over time | No |
| Route optimisation | $1,000–$5,000/yr | 5–8% on eligible routes | Route-dependent | No |
| FuelMarble L | $709/truck (once) | 7–15% per truck | Never — permanent | Yes — every mile |
Verified on Heavy Diesel — Not Just Passenger Cars
Commercial bus trials and bulk carrier verification across Japan, Indonesia, and China. All results independently recorded on diesel engines equivalent to US Class 7–8 horsepower.
Yamanashi Kotsu — Isuzu & Hino Diesel Buses
Operator-documented day-by-day fuel logs · September–October 2024
C932 — City route (Hino diesel)
4.11 km/L → 5.02 km/L
C933 — Highway coach (Isuzu diesel)
3.46 km/L → 4.01 km/L
TRES FELICES — 55,810-Tonne Bulk Carrier
North America → Japan route · Wind-controlled methodology
DPF-Safe, DEF-Safe, and FMCSA-Friendly
Modern US semi-trucks operate complex after-treatment systems — DEF/SCR, DPF, and EGR. FuelMarble works in the coolant circuit and never contacts any of these systems. No fault codes, no warranty concerns, no FMCSA compliance risk.
No DEF or SCR interference
FuelMarble is installed in the coolant reservoir — completely isolated from the fuel, DEF, and exhaust systems.
DPF protection, not risk
Cleaner combustion from improved thermal efficiency means less soot load on the DPF, reducing regeneration frequency.
Transferable at truck turnover
Remove from a retired truck and reinstall in its replacement. Your investment travels with your fleet, not the vehicle.
No mechanic, no downtime
Drop-in install in under 60 seconds. A dispatcher can equip an entire yard of Class 8 trucks in a morning.
Request a US Fleet Quote
Fleet orders of 5 or more trucks qualify for volume pricing. Share your truck classes and fleet size — we will respond within one business day with a tailored USD quote and ROI breakdown.
Tailored ROI report in USD
We will calculate your specific fleet annual saving based on truck class, miles per year, and current diesel price.
Volume pricing for 5+ trucks
The larger the fleet order, the lower the per-unit cost and the shorter the payback period.
Response within 1 business day
Email: info@fuelmarble.com · WhatsApp: +44 7344 668989
Frequently Asked Questions
Ready to Cut Your US Fleet Fuel Bill?
Order FuelMarble L for your Class 3–8 trucks, or request a fleet quote for volume pricing in USD.
Also available: UK fleet pricing in GBP · Canadian fleet pricing in CAD