Reduce Fleet Running Costs by 7–15% — Permanently
FuelMarble is the only HGV fuel saving device verified across 9 independent tests in 3 countries. No fuel additives, no engine modifications, no ongoing cost. Install in under 60 seconds per vehicle.
Example: 20-Van Delivery Fleet
20 diesel LCVs · 150 miles/day · 10% saving at £1.49/L diesel
~£19,000/yr saved
On a one-time investment of £10,380 · Payback in ~4 months
Verified Under Independent Standards
How Much Can Your Fleet Save?
Enter your fleet size, vehicle type, and daily mileage. The calculator uses 10% — a conservative estimate within the independently verified 7–15% range.
Fleet ROI Calculator
Based on 10% fuel saving — conservative estimate within the verified 7–15% range
Recommended: 1× FuelMarble L per vehicle (£519 each)
Current UK pump average: ~£1.49/L
Assumed fuel economy: 35 mpg (UK gallons) for large van / lcv (≤3.5t). Calculator uses a conservative 10% fuel efficiency improvement — verified results show 7–15% across 9 independently tested vehicles.
Annual Fuel Saving
£10,596
across entire fleet
Monthly Saving
£883
from month one
Total Investment
£5,190
one-time hardware cost
Payback Period
6 months
typical 2–8 months
3-Year Net Return
+£26,598
After full hardware cost recovery · Based on £105,960 annual fleet fuel spend
FuelMarble vs. Other Fleet Cost Levers
Fuel cards reduce your unit cost. Driver training reduces consumption per kilometre. Route optimisation reduces total mileage. If you have already done all three and your fleet fuel spend is still running above benchmark, the problem is inside the combustion chamber — and it cannot be reached by any of those three levers.
| Lever | One-time cost | Annual saving | Ceiling | Compounds? |
|---|---|---|---|---|
| Fuel cards | None | 2–4p/litre discount | Hit in year 1 | No |
| Driver training | £200–£500/driver | 3–5% fuel reduction | Degrades over time | No |
| Route optimisation | £500–£2,000/yr | 5–8% on eligible routes | Route-dependent | No |
| FuelMarble L | £519/vehicle (once) | 7–15% per vehicle | Never — permanent | Yes — every km |
The Right Unit for Every Vehicle Class
FuelMarble is sized to match coolant volume. Mixed fleets can be fully equipped in a single order.
Cars & Vans
Transit, Sprinter, Vivaro, Ducato
Required
1× FuelMarble S or L
Medium Trucks
7.5t box truck, curtainsider, flatbed
Required
2× FuelMarble L
HGV / Artic
44t artic, 26t rigid, tipper
Required
3× FuelMarble L
Not sure which size? Contact us with your vehicle list and we will confirm the exact configuration.
Four Ways Fleets Cut Fuel Costs
Fuel cards reduce your unit cost. Driver training reduces your consumption per kilometre. Route optimisation reduces your total mileage. If you have already done all three and your fleet fuel spend is still running above benchmark, the problem is inside the combustion chamber — and it cannot be reached by any of those three levers.
FuelMarble addresses the combustion efficiency root cause — the one gap that behaviour and procurement changes cannot close.
| Method | Typical saving | Ongoing cost | Addresses combustion? | Setup |
|---|---|---|---|---|
| Fuel cards | 2–5% unit cost reduction | Annual fee + admin | No | Contract required |
| Driver training | 5–10% consumption reduction | Recurring training cost | No | Scheduling required |
| Route optimisation | 5–15% mileage reduction | Software subscription | No | Integration required |
| FuelMarble | 7–15% fuel efficiency gain | £0 after purchase | Yes — verified | Under 60 seconds per vehicle |
FuelMarble works alongside fuel cards, training, and route optimisation — combined deployment addresses every layer of fleet fuel cost.
Why Fleets Choose FuelMarble Over Fuel Additives
Fuel additives carry ongoing purchase cost, DPF contamination risk, and unverified claims. FuelMarble is a one-time hardware investment with zero recurring cost — and every efficiency improvement compounds over time.
No recurring spend
One unit per vehicle, for the life of the vehicle. No subscriptions, refills, or replacements.
DPF-safe
Operates in the coolant circuit — never contacts fuel, exhaust, or DPF. No risk to emissions warranty.
2-minute install, zero downtime
Drop into the coolant reservoir. A 20-van fleet can be fully equipped in under an hour.
Transferable between vehicles
Move FuelMarble from a retired vehicle to a new one — your investment stays with your business.
Real-World Fuel Test Results — 9 Vehicles
All Japan tests conducted under TRIAS 71-2001 chassis dynamometer protocol. Verified by Kurume Institute of Technology.
Toyota Granvia
2700cc
Before
4.1 km/L
After
4.73 km/L
Land Rover
4000cc
Before
5.4 km/L
After
6.0 km/L
Toyota Hilux Surf
2700cc
Before
4.5 km/L
After
5.1 km/L
Mercedes-Benz C Class
3500cc
Before
7.0 km/L
After
9.1 km/L
Honda Accord
2500cc
Before
9.9 km/L
After
12.6 km/L
Toyota Corolla Fielder
1500cc
Before
13.6 km/L
After
15.0 km/L
Request a Fleet Quote
Fleet orders of 5 or more vehicles qualify for volume pricing. Share your fleet details and we will respond within one business day with a tailored quote and ROI breakdown.
Tailored ROI report
We will calculate your specific fleet's annual saving based on actual vehicle specs.
Volume pricing
Fleets of 5+ vehicles qualify for reduced per-unit pricing. The larger the fleet, the lower the payback period.
Response within 1 business day
WhatsApp: +44 7344 668989 · Email: info@fuelmarble.com
Frequently Asked Questions
Ready to Cut Your Fleet Fuel Bill?
Calculate your ROI above, then place your order — or request a fleet quote for volume pricing.