Not Ready for an EV?
Reduce Your Emissions by Up to 98% Today.
FuelMarble is an emission reduction device for cars, vans, and HGVs — verified to cut CO by 93% and NOx by 98% without engine modifications. GB18285-2005 and TRIAS 71-2001 tested. Japan Fair Trade Commission approved.
Based on independent government-standard emissions tests in Japan (TRIAS 71-2001) and China (GB18285-2005).
The mechanism behind the numbers
Emissions fall because combustion becomes more complete — not because exhaust gases are filtered or chemically treated. CO (carbon monoxide) is produced when carbon atoms burn without enough oxygen. FuelMarble's volumetric efficiency improvement delivers more oxygen per stroke, allowing carbon to fully oxidise to harmless CO₂ instead of escaping as CO. Unburned hydrocarbons (HC) fall for the same reason. NOx reduction follows from the longer, more controlled effective combustion cycle — lower peak temperature spikes mean less nitrogen oxidation.
These are the same combustion physics targeted by turbochargers and direct injection systems. FuelMarble achieves them through coolant-side thermal management — no engine modifications required.
Source: Kurume Institute academic paper; Chinese lab emission data
Real Emission Reduction Numbers
These are not manufacturer estimates. All figures are from independent third-party tests using certified measurement equipment.
Why FuelMarble Reduces Emissions
Harmful exhaust emissions are almost entirely a product of incomplete combustion. When fuel does not burn completely, it exits the engine as CO, HC, NOx, and particulate matter — all of which are toxic to humans and damaging to the environment.
FuelMarble addresses this at the root cause. By improving coolant performance and stabilising cylinder head temperatures by 8–12°C, it creates optimal conditions for complete fuel burn on every combustion cycle.
When organic materials burn in oxygen-deficient conditions, carbon monoxide, hydrocarbons, and black smoke are produced.
When organic matter is combined with sufficient oxygen, it forms only carbon dioxide and water — clean exhaust technology at source.
Emission Test Results
Select a case study to view verified emission reduction data from independent tests across 3 countries.
Test Summary
Honda Freed MPV 2012 (1500cc): Testing in Jakarta demonstrated a 10.34% reduction in Carbon Dioxide (CO₂) emissions.
Carbon Dioxide (CO₂)
Greenhouse gas emission measured per kilometre.
How Much Could You Eliminate?
Enter your vehicle details to estimate your personal CO₂ and CO reduction — based on independently verified FuelMarble test results.
Carbon & Emission Savings Estimator
Based on 10% fuel saving and 93% CO reduction — independently verified results
CO₂ Saved / Year
330 kg
from 10% fuel reduction
CO Eliminated / Year
26.9 kg
at 93% CO reduction
Fuel Saved / Year
130 litres
equivalent to 28.6 UK gallons
Your Annual CO₂ Footprint
3,304 kg
current, before FuelMarble
After FuelMarble
2,974 kg
CO₂ calculation uses BEIS 2024 emission factors (2.544 kgCO₂e/litre). CO baseline uses Euro standard averages — actual results vary by vehicle condition and driving cycle.
Reduce My Emissions — Shop FuelMarble →What FuelMarble Can and Cannot Do Under UK Law
ULEZ / CAZ Zone Compliance Status
ULEZ and Clean Air Zone compliance is determined by a vehicle's DVLA-registered Euro emission standard — checked via ANPR camera, not tailpipe test. A vehicle's Euro standard is fixed at manufacture and cannot be changed by any aftermarket device, including FuelMarble.
Fuel Economy & CO₂ Output
FuelMarble reduces actual fuel consumption by 7–15%, directly cutting your CO₂ output per kilometre. For fleets under Scope 3 reporting obligations (CSRD / UK SDR), this reduces the verified emissions figure that clients and auditors measure.
MOT Emissions Test Results
The MOT emissions test measures actual exhaust output — CO, HC, and NOx concentrations at the tailpipe. FuelMarble's verified reductions (CO −93%, HC/NOx −98%) directly improve these test readings, reducing the risk of failure on emissions grounds.
FORS & Fleet Sustainability Metrics
Fleet operators under FORS (Fleet Operator Recognition Scheme) or similar accreditation schemes track actual fuel consumption and emission output — not Euro standard classification. FuelMarble improves both metrics with verified, documentable results.
Lower Vehicle Carbon Footprint
Every litre of diesel saved eliminates 2.544 kgCO₂e from your vehicle's Scope 1 emissions. At 7–15% fuel reduction across an average 12,000-mile/year vehicle, that is 90–190 kg CO₂ removed from your annual carbon footprint per vehicle.
Where Emission Reduction Matters Most
MOT Emissions Failure
The MOT test measures actual tailpipe CO concentration at idle and HC at fast idle. FuelMarble's independently verified 93% CO reduction and 98% HC reduction directly improves these readings. Drivers with vehicles approaching MOT emissions thresholds can install FuelMarble before their retest.
Clean Air Zone Exposure
What FuelMarble can do: reduce your actual tailpipe CO output by up to 93% and NOx by up to 98% — improving your MOT emissions test result and reducing your vehicle's carbon footprint, even if your Euro standard classification stays the same. Applicable for urban drivers in London ULEZ, Birmingham CAZ, Bath CAZ, and Bristol CAZ.
Scope 3 / CSRD Fleet Reporting
Fleet operators under CSRD, UK SDR, or FORS sustainability reporting need documented fuel consumption reduction data. FuelMarble's independently verified 7–15% fuel efficiency improvement reduces your Scope 1 fleet emissions by a calculable amount — with a published test methodology that satisfies auditor requirements.
Reduce Your Vehicle's Emissions Today
Not ready for an EV? FuelMarble cuts CO by 93%, NOx by 98%, and lowers your carbon footprint — permanent results, no chemicals, installs in under 60 seconds.