Passenger Vehicles
S
Best for sedans, SUVs, and small delivery vans.
Fleet ROI Estimator
Fleet Fuel Savings Calculator
Enter your fleet composition, mileage, and fuel details to calculate your monthly savings and payback period with FuelMarble.
Select your region — units are set automatically
🇬🇧 United Kingdom — units in use: miles · mpg (UK/Imperial) · £
Distance in miles · Efficiency in UK/Imperial MPG · Fuel sold & priced in £/litre. Note: UK fuel consumption is rated in MPG, but petrol/diesel is purchased in litres at the pump. 1 UK (Imperial) gallon = 4.546 litres.
ℹ
UK & Canadian gallon are identical — both use the Imperial gallon (4.546 L), which is ~20% larger than the US gallon (3.785 L). Canada transitioned to metric (litres & L/100km) for everyday use, but the legal definition of the Canadian gallon remains the Imperial standard.
US gallon
3.785 L
UK/CA gallon
4.546 L
1 UK gal
≈ 1.201 US gal
1. Trip & Efficiency Patterns
miles
Unit locked to your region — switch tabs above to change
mpg (UK/Imperial)
Typical UK: cars 35–55 mpg · SUVs 28–40 mpg · delivery vans 25–38 mpg · HGVs 6–12 mpg
UK MPG uses Imperial gallons (4.546 L) — fuel is still bought in litres at the pump
£
Enter price per litre in £ — UK avg ~£1.40–1.58/L (petrol); ~£1.45–1.62/L (diesel)
Typical commercial fleet: 22–26 working days/month
2. Fleet Composition
Typical range: 7–15%. Actual results vary by vehicle type, load, and driving style.
Monthly Savings
£29.16
FuelMarble Units Needed
1× S 0× L
Payback Period
8.2 Months
Estimates based on your inputs. Actual results depend on vehicle type, load, route, and driving conditions.
Why does vehicle weight determine FuelMarble unit size?
Combustion optimization requires different surface area treatments based on fuel flow rates. Vehicles weighing less than 2 tons use FuelMarble S, while those weighing 2–4 tons require FuelMarble L. For heavy-duty applications, trucks weighing 4–13 tons require 2 L units, while those over 13 tons require 3 L units to effectively handle the substantial fuel volume.
Real-World Example
Fleet ROI Case Study: 5-Vehicle Delivery Team
Fleet Benchmark Result
Total Annual Fleet Savings
£2,565
5Vehicles
30KMiles / Year
10%Efficiency Gain
<12moFull Payback
A fleet of 5 light commercial vehicles (below 2-ton) traveling 30,000 miles each per year at 35 mpg (£1.45/L) incurs a total annual fuel cost of £28,215. By applying FuelMarble technology to achieve a 10% efficiency gain, the fleet reduces expenditure to £25,650, generating a total annual saving of £2,565 and achieving full payback on the hardware investment within months.
Get a Fleet QuoteHow do you calculate fuel cost for a commercial fleet?
To calculate fleet fuel costs, multiply the average daily distance per vehicle by the total number of active days and the number of vehicles. Divide this by the average fuel efficiency (MPG or km/L) and multiply by the current fuel price. This establishes your baseline expenditure before optimization.
What is the payback period for fuel saving technology?
The payback period, or ROI, is calculated by dividing the total cost of the hardware (FuelMarble units) by the monthly fuel savings. For high-mileage fleets, this break-even point typically occurs within 3 to 10 months per unit, as confirmed by our ROI calculator benchmarks.
Store
Find the Right FuelMarble for Your Vehicle
Two sizes cover every vehicle class — from personal cars to heavy haulage. Use the guide below to choose the correct size.
2-Ton Truck
L
Standard commercial light trucks.
4-Ton to 13-Ton
L
Install two L-Size units for engines in this class.
Over 13-Ton
L
Required for heavy haulage and industrial machinery.
FuelMarble S
For passenger cars, delivery vans & light vehicles
- Up to 15% fuel efficiency gain
- CO reduced by up to 93%
- HC & NOx reduced by up to 98%
- Drop-in coolant reservoir install
- Zero maintenance required
- Made in Japan
£239
FuelMarble L
For SUVs, heavy-duty diesels, fleets & large vehicles
- Up to 15% fuel efficiency gain
- CO reduced by up to 93%
- HC & NOx reduced by up to 98%
- Drop-in coolant reservoir install
- Zero maintenance required
- Made in Japan
£519
FAQ