~£8,000 Annual Saving on a 10-Truck Fleet
Fuel is the single largest controllable cost for any delivery company. Whether you run a two-van courier operation or a fleet of 50 diesel vehicles making last-mile drops across the city, fuel typically accounts for 25–35% of total operating costs — and stop-and-go urban driving pushes that figure even higher. FuelMarble is a scientifically verified fuel efficiency device that delivers an average 7–15% fuel cost saving on haulage trucks, delivery vans, and commercial vehicles. Every vehicle in your fleet installs in under 2 minutes — no downtime, no mechanics, no modifications.
The Case for Every Fleet Manager
Fuel is typically the largest controllable cost in fleet operations. FuelMarble addresses it directly — with no operational disruption.
7–15% Average Fuel Cost Saving
Independently verified across multiple vehicle classes. For a 10-van fleet running 80 miles per day, that is £4,032–£8,640 recovered annually on a one-time investment.
98% Reduction of HC and NOx — Fleet Emissions Compliance
Verified reductions in Hydrocarbons and Nitrogen Oxides by up to 98%, plus CO by 93%. Cleaner combustion helps fleets operating near Clean Air Zones and ULEZ.
180k+ Units Sold — Trusted Across 10+ Countries
Over 180,000 units deployed globally across Japan, Southeast Asia, China, and beyond. Cleared by the Japan Fair Trade Commission — independently verified performance data.
No Fleet Downtime
Each unit installs in under 2 minutes directly into the coolant reservoir. No mechanical work, no service booking, no vehicle modifications — vehicles return to service immediately.
DPF Protection
Cleaner combustion reduces the soot load on diesel particulate filters — extending DPF service intervals, reducing costly regeneration cycles, and protecting against premature failure.
No Warranty Concerns — Transferable Between Vehicles
FuelMarble makes no physical modification to any vehicle system. It can be moved between vehicles in your fleet at any time — protecting your warranty and your investment.
Why Fuel Costs Are Breaking Delivery Companies Right Now
The margins are unforgiving. Pre-tax profit for UK road freight operators has slid to just 1.58% in recent years, down from 2.60% the year before, with operating costs rising faster than inflation.
Fuel sits at the centre of that pressure — and unlike labour or insurance, it moves unpredictably, often within days. As of December 2025, diesel averaged 144.27p per litre across UK forecourts, according to RAC Fuel Watch.
The Competition and Markets Authority (CMA) confirmed that fuel margins at UK forecourts remain at "persistently high levels", with non-supermarket retailers operating at 11.1 pence per litre margin — costs passed directly to fleet operators with every fill.
For a delivery company running 20 vans covering 80 miles each per day:
- •Daily diesel spend: approximately £460
- •Annual diesel spend: approximately £115,000
- •Average 15% FuelMarble saving: approximately £17,280 per year
Fleet operators cannot control the price of diesel. But they can control how efficiently their engines burn the fuel they buy.
How FuelMarble Reduces Fuel Consumption in Delivery Vehicles
FuelMarble's thermal optimisation technology works at the root cause of diesel inefficiency — incomplete combustion. Here is how it applies to the specific conditions delivery fleets face.
1+−Thermal Optimisation of the Coolant SystemThe Science
FuelMarble is placed in the vehicle's coolant reservoir, where it stabilises combustion temperatures across the engine's full operating cycle. More stable temperatures mean more complete fuel burn — more energy is extracted from every litre of diesel, and less is lost as unburned exhaust gases.
2+−Built for Urban Stop-and-Go DeliveryDelivery Specific
Frequent idling, cold starts between drops, and variable loads are the exact conditions that cause the most incomplete combustion in diesel van engines. FuelMarble addresses the root cause of that inefficiency — no driver behaviour changes or route modifications required.
3+−Drop It In. Works Immediately.Under 5 Minutes
No mechanical modification. No specialist tools. No vehicle downtime. The device drops into the coolant reservoir in under 2 minutes. No refills, no maintenance, no power source — ever. FuelMarble calls this "drop and forget" installation.
4+−A Decade of Japanese Engineering Research10 Years R&D
Developed over 10 years through collaboration between Kurume Industrial University, Kurume National College of Technology, and the Kyushu Institute of Technology — three Japanese engineering institutions whose combined research forms the scientific foundation of the product's thermal optimisation performance.
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Calculate Your Fleet Savings
Enter your fleet details to estimate your monthly fuel savings, units needed, total investment, and payback period.
1. Trip & Efficiency Patterns
Typical cars average 35–50 mpg (UK) or 15–22 km/L.
2. Fleet Composition
Typical range: 7–15%. Actual results vary by vehicle type, load, and driving style.
Estimates based on your inputs. Actual results depend on vehicle type, load, route, and driving conditions.
Estimated Annual Savings for Delivery Fleets
The figures below show what FuelMarble could save your fleet annually, based on UK diesel at 144p per litre (RAC Fuel Watch, December 2025), 35 mpg average for light commercial vans, and 250 operating days per year. Savings are shown at both ends of the independently verified range — 7% and 15% — so you can plan conservatively or optimistically.
| Fleet Size | Daily Miles / Van | Annual Fuel Cost | Saving at 7% | Saving at 15% |
|---|---|---|---|---|
| 2 vans | 80 miles | £11,520 | £806 | £1,728 |
| 5 vans | 80 miles | £28,800 | £2,016 | £4,320 |
| 10 vansPopular | 80 miles | £57,600 | £4,032 | £8,640 |
| 20 vans | 80 miles | £115,200 | £8,064 | £17,280 |
| 50 vans | 80 miles | £288,000 | £20,160 | £43,200 |
FuelMarble and Clean Air Zones: A Cost Saving and Compliance Tool
Fuel efficiency is only part of the story. Verified testing in Japan confirmed that FuelMarble reduces Carbon Monoxide (CO) emissions by up to 93% and Hydrocarbons (HC) and NOx by up to 98% in controlled trials, and reduces CO₂ emissions by over 10% in congested urban environments.
For delivery companies operating in or near UK Clean Air Zones (CAZ) and London's Ultra Low Emission Zone (ULEZ), this matters beyond the balance sheet. Daily charge rates for non-compliant diesel vans in ULEZ currently stand at £12.50 per day — adding over £3,000 per vehicle per year for fleets making regular London deliveries.
FuelMarble does not convert a non-compliant vehicle to compliant status for CAZ purposes. However, the verified reduction in harmful emissions makes it a meaningful step toward cleaner fleet operation — reducing both environmental impact and the long-term pressure on operators to replace older vehicles before their economic life ends.
Protect Your Diesel Particulate Filters
Premature DPF failure is one of the most common and costly maintenance issues in diesel fleets. FuelMarble reduces the soot load reaching the DPF — extending filter life and reducing unplanned downtime.
- Cleaner combustion = less soot per journey
- Extended DPF regeneration intervals
- Reduced risk of DPF blockage and failure
- Lower repair and replacement costs
- Fewer unplanned maintenance stops
Average DPF replacement cost
Per vehicle. Extending DPF life even by one replacement cycle more than covers the cost of FuelMarble across a fleet.
Downtime cost per vehicle
A day off the road for DPF service can cost a delivery operation significantly more than the repair itself in missed revenue. FuelMarble reduces the frequency of these events.
How Many FuelMarble Units Does My Vehicle Need?
FuelMarble L is the correct choice for all commercial vehicles in your delivery fleet. The number of units required depends on the gross vehicle weight.
2-Ton Truck
Standard commercial light trucks and larger delivery vans.
4-Ton to 13-Ton
Install two L-size units for engines in this weight class.
Over 13-Ton
Required for heavy haulage and industrial machinery.
FuelMarble L — Built for Commercial Vehicles and Delivery Fleets
The FuelMarble L is purpose-built for haulage trucks, large delivery vans, and commercial vehicles between 2–4 tonnes GVW.
FuelMarble L
- Haulage trucks, large delivery vans & fleets
- 7–15% fuel cost saving
- DPF protection — reduced soot production
- CO reduced by 93%
- NOx reduced by 98%
- Drop-in coolant reservoir installation
- Zero maintenance required
- Made in Japan
Ready to Reduce Your Fleet's Fuel Bill?
Order FuelMarble L for your fleet today, or contact us to discuss volume pricing and fleet support.
More FuelMarble Applications
Save up to 20% on fuel in personal cars, vans, SUVs, and motorcycles. Drop-in coolant installation.
Boost crop yields by 20–30% and cut irrigation costs with FuelMarble water activation technology.
Reduce vessel fuel consumption by 5–15%. Verified 7.33% reduction on a commercial bulk carrier.