Real-World Verified Results

Independent tests across multiple countries and vehicle types confirm FuelMarble delivers consistent fuel efficiency improvements, with an average 20% improvement across all documented tests.

20%
Average Fuel Efficiency Gain

Driving distance increased proportionally with no engine modifications or recurring costs.

7–15%
Average Fuel Cost Savings

Based on real-world fuel prices and driving patterns, users save significantly on annual fuel spend.

3
Countries Tested

Independent tests conducted in Japan, Indonesia, and China across multiple vehicle types and conditions.

180k+
Units Sold Worldwide

FuelMarble is the only product cleared by the Japan Fair Trade Commission (JFTC) following a 2008 investigation into fuel-saving claims. While 19 competitors received cease-and-desist orders for lacking evidence, FuelMarble's valid performance data allowed it to remain on the market.

Jakarta, Indonesia · Jan–Mar 2023
21.75%
Fuel Efficiency Improvement
Vehicle: Honda Freed 1500cc MPV (2012)
Period: January 25 – March 25, 2023

Independent 2-month road test on a 2012 Honda Freed 1500cc in Jakarta traffic. Using a consistent fill-to-fill methodology with the same driver and routes, FuelMarble delivered a sustained 21.75% improvement in fuel efficiency compared to the pre-installation baseline.

Jakarta test — before FuelMarble installation
Before
Jakarta test — after FuelMarble installation showing 21.75% improvement
After FuelMarble
Qinhuangdao, China · Fleet Test
18%
Fuel Efficiency Improvement
Vehicle: Honda Accord 2000cc (2007)
Period: April 18 – April 19, 2019

Fleet test across multiple Honda vehicles at a Qinhuangdao facility, independently conducted by Shiao Moto Vehicle Testing Company Ltd. and certified by the Qinhuangdao City Ecological Environment Bureau. Results confirmed consistent fuel efficiency improvements across all tested models.

China test before and after — FuelMarble fuel efficiency results
By Vehicle Model

What are the fuel efficiency results for specific vehicle models?

Real-world performance data across tested vehicles. Results vary by engine size, age, and driving conditions.

Japan Test

Mercedes Benz C Class

3500cc

Before7.0 km/L
After9.1 km/L
+30.0%Performance Gain
Japan Test

Honda Accord

2500cc

Before9.9 km/L
After12.6 km/L
+27.3%Performance Gain
China Test

Honda Accord

2500cc

Before9.9 km/L
After12.6 km/L
+27.3%Performance Gain
Japan Test

Daihatsu Mouvement

660cc

Before12.3 km/L
After15.3 km/L
+24.4%Performance Gain
Test Methodology

How Tests Were Conducted

01
Baseline Period

A minimum 30-day baseline was established before FuelMarble installation, recording fuel consumption under normal driving conditions using the fill-to-fill method.

02
Controlled Conditions

The same vehicle, driver, and routes were used throughout the test. No other changes were made to the vehicle, fuel type, or driving habits during the monitoring period.

03
Fill-to-Fill Measurement

Fuel consumption was calculated by recording the volume needed to refill the tank to the same level at each fill-up, expressed as km per litre.

04
Post-Installation Monitoring

Results were recorded for a minimum of 60 days after installation to account for the 150–200 km activation period and to confirm sustained improvement.

Independent Verification

Who Verified the Data?

Academic Research Partners
Kurume University & Kurume National College of Technology

Academic research partners behind the core hydrophilic thermal technology, validated over 10+ years.

Engineering Co-Developer
Kyushu Institute of Technology

Co-developer of the engineering foundation for thermal optimisation performance.

Independent Vehicle Testing Body
Shiao Moto Vehicle Testing Company Ltd.

Independent vehicle testing body that conducted the China fuel efficiency trials.

Government Environmental Body
Qinhuangdao City Ecological Environment Bureau

Government environmental body that certified the emissions results from China testing.

Professional Engineering Body
Automotive Engineering Society

Professional engineering body that validated the technical methodology.

Regulatory Clearance · 2008
Japan Fair Trade Commission (JFTC)

Cleared all efficiency claims as substantiated under Japan's advertising standards, following an investigation in which 19 competitors received cease-and-desist orders.

Ready to See These Results in Your Vehicle?

Use our Fuel Calculator to estimate your personal savings based on your vehicle and driving habits.