Fuel Ox field trial shows 12.31% fuel efficiency gain in UK fleet test

An independent 11-month trial in the UK found Fuel Ox improved fuel economy for a 40-tonne tractor-trailer fleet, then performance fell when untreated fuel returned. The results matter for diesel operators looking for lower fuel use, reduced AdBlue/DEF consumption, and less visible exhaust smoke.

Why it matters: - The trial gives fleet operators a real-world data point from a long-duration, independent test rather than a short lab demo. - A 12.31% fuel-efficiency gain, plus lower AdBlue/DEF use and less visible smoke, could translate into lower operating costs and emissions-related benefits for diesel fleets. - The third phase — when the fleet returned to untreated fuel — is the key signal. Performance dropped below the original baseline, which strengthens the case that the treated fuel drove the gains.

What happened: - Industrial Sustainability Group International LLC announced results from an 11-month fleet trial of Fuel Ox® with Combustion Catalyst. - Tyre Renewals Ltd ran the trial in Castle Cary, Somerset, UK, and IESG Limited evaluated the data. - The test covered 11 40-tonne tractor-trailers and 164,274 kilometers of real-world operation. - The fleet moved through three phases: untreated fuel, Fuel Ox-treated fuel, then untreated roadside diesel again.

The details: - Phase 1 averaged 8.33 mpg over 58,947 km on untreated fuel. - Phase 2 rose to 9.36 mpg with Fuel Ox treatment, a 12.31% improvement. - Nine of the 11 vehicles posted gains during the treatment phase. - The best-performing vehicle improved 30.45%. - Phase 3 fell to 7.75 mpg on untreated roadside fuel. - That was 17.19% below the treated result and lower than the pre-trial baseline. - The trial also recorded more than a 21% reduction in AdBlue/DEF consumption during the treatment phase. - Visible exhaust smoke fell by more than 80% during treatment. - IESG Limited said the performance regression of more than 17% on base fuel was "a very firm indicator" of the treated fuel's efficiency. - Fuel Ox® is certified to ASTM D975 and EN 590, registered with the EPA, and described as OEM-safe across diesel, biodiesel blends, kerosene, and heavy fuel oil. - The product uses a patented organometallic combustion catalyst at a 1:10,000 treatment ratio, meaning one gallon treats 10,000 gallons. - The company says the technology traces to Bell Labs and has been used in commercial fleets, mining operations, marine applications, and military use. - The company invited fleet operators interested in replicating the results to contact Fuel Ox directly. - More information is available on the company’s website.

Between the lines: - The three-phase structure matters because it reduces the chance that the fuel-economy improvement came from weather, driver behavior, or other one-off variables. - The drop below baseline after the switch back to untreated fuel is the strongest part of the argument for causation, although the trial still reflects a single fleet and one operating environment. - The results are especially relevant for high-mileage diesel fleets that are sensitive to even small changes in mpg, AdBlue/DEF use, and smoke output.

What's next: - Fuel Ox says fleet operators can contact the company to replicate the Tyre Renewals trial. - Wider adoption will likely depend on whether other fleets can reproduce the same efficiency gains under similar operating conditions. - The company will probably use the trial as a sales and validation tool with fleet, mining, marine, and fuel-distribution customers.

The bottom line: - Fuel Ox has a rare field result: the fleet improved with treatment, then got worse when the treatment stopped.