Save Up to 20% on Every Tank
FuelMarble is designed for all coolant-equipped vehicles below 2 tons — from sedans, SUVs, MPVs, and Land Rovers to commercial vans and high-mileage drivers including Uber, Bolt, Grab, and taxi operators. Drop it into your coolant reservoir and start saving fuel from your very first journey — no tools, no chemicals, no maintenance ever.
Built for Every Road Vehicle Below 2 Tons
Whether you commute daily, run a ride-share business, or manage a van fleet, FuelMarble delivers measurable savings and cleaner emissions on every tank.
Up to 20% Fuel Efficiency Gain
Verified by independent testing across multiple vehicle classes. Real-world fleet and passenger vehicle tests in Japan, Indonesia, and China confirm 7–15% improvement in fuel consumption.
7–15% Cost Saving per Tank
At current UK fuel prices, a typical driver can recover the cost of FuelMarble within 6–10 months and continue saving every time they fill up — indefinitely.
CO Emissions Reduced by 93%
FuelMarble dramatically reduces carbon monoxide output — verified to a 93% reduction in government-certified testing. Cleaner exhaust and reduced exposure to clean air zone charges.
Zero Maintenance — Set and Forget
Once placed in your coolant reservoir, FuelMarble requires no servicing, no refilling, and no chemicals. It works permanently for the life of the vehicle with zero intervention.
Compatible with Any Coolant Vehicle
Petrol, diesel, hybrid. Sedans, SUVs, MPVs, Land Rovers, vans. If your vehicle has a coolant reservoir and an internal combustion engine below 2 tons, FuelMarble S fits.
Developed Over 10 Years, Widely Adopted in Asia
Developed and refined in Japan over a decade, with over 180,000 units sold across Japan, Southeast Asia, and beyond. Cleared by the Japan Fair Trade Commission — independently verified.
Installed in Under 2 Minutes
No mechanic. No tools. No modifications. FuelMarble drops directly into your coolant reservoir.
Important: FuelMarble is placed into the coolant reservoir, not the fuel tank. Always ensure the engine is cold before opening the coolant cap.
Locate Your Coolant Reservoir
Open the bonnet and find the coolant reservoir — usually a translucent plastic tank near the radiator. Consult your vehicle manual if unsure.
Remove the Cap
Ensure the engine is cold before opening the coolant reservoir cap. Safety first — never open a pressurised hot coolant system.
Place FuelMarble Inside
Drop FuelMarble S into the coolant reservoir. The device sits submerged in coolant and begins working immediately.
Replace the Cap and Drive
Secure the cap, close the bonnet, and drive as normal. No break-in period. Full effect is typically observed within the first full tank of fuel.
FuelMarble S — The Right Fit for Vehicles Below 2 Tons
The FuelMarble S is purpose-built for passenger cars, SUVs, MPVs, and light commercial vans — any petrol or diesel vehicle under 2 tons.
FuelMarble S
- Personal cars, SUVs, MPVs & vans (below 2 tons)
- Up to 20% fuel efficiency gain
- CO reduced by 93%
- NOx reduced by 98%
- Drop-in coolant reservoir installation
- Zero maintenance required
- Made in Japan
Explore the L Size or Contact Us
For vehicles between 2 and 4 tons — including larger SUVs and light trucks — FuelMarble L is the right choice. Or reach out and we will help you find the right fit.
More FuelMarble Applications
Boost crop yields by 20–30% and cut irrigation costs with FuelMarble water activation technology.
Save ~£8,000 per year on a 10-vehicle delivery fleet. DPF protection and zero downtime.
Reduce vessel fuel consumption by 5–15%. Verified 7.33% reduction on a commercial bulk carrier.