Road Transport & Fleets
Trucks, buses, vans and municipal fleets operating under real road conditions.
Cleaner Combustion Technology
Reduce smoke, soot and fuel waste at the source.
O3 Protegelo is a passive fuel-line technology that improves combustion in diesel, gasoline and other liquid-fuel engines — with no additives, no electronics and no ECU modification.
5,000+ installations
No additives
No electronics
No ECU changes
Made in Spain
Proof & Results
Real-world combustion improvement, measured before and after.
O3 Protegelo has been deployed across thousands of installations in transport, marine, port, industrial and ground-support applications. Results are drawn from over 250 emissions tests across multiple engine types and sectors.
Thousandsof installations across multiple sectors and markets
250+emissions tests across engine types, fuels and duty cycles
Reportsemissions, opacity and dyno test data available on request
Typical observed improvements
| Parameter | Typical observed range | Notes |
|---|---|---|
| Smoke / Opacity | Up to 70–90%+ reduction in suitable applications | Most consistently seen in older engines, high-idle, low-load operation and applications with visible smoke. |
| HC — Hydrocarbons | Up to 60% reduction | Higher reductions observed in selected tests. Lower HC indicates less unburned fuel and can help reduce fouling in EGR, intake and exhaust systems. |
| CO — Carbon Monoxide | Up to 50% reduction | Varies by engine condition and test point. CO is a key indicator of incomplete combustion and usually improves together with smoke, soot and HC. |
| Particulate / Soot | Clear reduction in suitable applications | Less soot formation can reduce DPF loading, extend regeneration intervals and reduce exhaust-system fouling. |
| Fuel Consumption | Engine and duty-cycle dependent | Improved combustion can improve fuel utilisation, but savings vary by engine type, fuel quality, load profile and measurement method. |
| NOx | Up to 35% reduction in suitable applications | Engine dependent. NOx response depends on engine design, calibration, combustion temperature, aftertreatment system and operating conditions. Should be measured case by case. |
Ranges are drawn from emissions test data across multiple engine types, fuels and duty cycles. Results vary according to engine condition, baseline emissions, maintenance status and installation configuration. Full test data available on request.
Solutions by Problem
Find the right O3 application for the problem you need to solve.
Operators usually search for a specific problem: smoke, DPF regeneration, HC condensation, EGR fouling, fuel waste or poor gasoline response. These dedicated pages explain each issue clearly and connect it to the relevant O3 Protegelo application.
01
Reduce Diesel Smoke & Opacity
For visible black smoke, opacity test problems and soot reduction at source.
02DPF Blockage & Regeneration Problems
How reducing wet soot, HC and soot formation can reduce DPF loading pressure.
03EGR & Intake Fouling from HC Condensation
Why unburned hydrocarbons and soot create sticky deposits in modern engines.
04Marine Diesel Emissions & Fuel Efficiency
For ferries, workboats, tugs, pilot boats, auxiliary engines and generators.
05Port, GSE & Construction Equipment
Idle-heavy, low-load diesel equipment where smoke, DPF and soot problems are common.
06Gasoline Engine Performance
Sharper throttle response, smoother acceleration and cleaner HC/CO combustion.
Applications
Built for the problems operators actually face.
O3 Protegelo is especially relevant where engines suffer from smoke, soot formation, idle-heavy operation, low-load duty cycles, DPF stress or fuel-efficiency pressure.
Port Equipment
Reach stackers, terminal tractors, forklifts, container handlers and heavy port machinery.
Construction & Mining
Excavators, loaders, dump trucks, cranes, compressors and off-road machinery.
Ground Support Equipment
Belt loaders, tractors, GPUs, pushbacks and diesel airport equipment.
Marine
Ferries, workboats, tugs, crew transfer vessels, pilot boats, auxiliary engines and marine generators.
Power & Utilities
Generator sets, pump sets, water treatment plant engines and backup power systems using liquid fuels.
Gasoline Performance Applications
Also relevant for performance cars and motorcycles.
O3 Protegelo is not limited to diesel fleets. In gasoline engines, improved combustion can contribute to sharper response, smoother acceleration and better torque feel — making it relevant for tuned road cars, track cars and high-performance motorcycles.
Operator Benefits
What operators gain.
Most diesel engine problems — DPF clogging, EGR fouling, visible smoke, rising fuel costs — share a common root: incomplete combustion. O3 Protegelo addresses this at source, before exhaust gases form.
Reduced DPF and EGR fouling
Many DPF and EGR issues originate from incomplete combustion, which produces soot and unburned hydrocarbons that form deposits throughout the intake and exhaust systems. By reducing these combustion by-products at source, O3 Protegelo helps slow deposit build-up, extend DPF regeneration intervals and maintain EGR performance.
Reduced smoke and visible emissions
More complete combustion produces less visible smoke and soot. The most consistently observed result across sectors — particularly in older engines, low-load operation and high-idle applications.
Lower HC and CO
Unburned hydrocarbons and carbon monoxide are direct indicators of incomplete combustion. Reducing them at source also reduces the condensation-related deposits that accumulate in EGR valves, coolers and intake manifolds.
Improved fuel utilisation
More complete combustion allows the engine to extract more energy from the fuel already supplied. Savings depend on engine condition, duty cycle and measurement method.
Simple retrofit, no system changes
External installation on the low-pressure fuel feed line. No additive tank, electrical connection, ECU modification or exhaust-side work required.
Gasoline Engines
Better combustion. Better response.
O3 Protegelo is not an ECU remap, fuel additive or tuning device. It is a passive fuel-line technology that improves the way gasoline oxidises during combustion — without adding fuel, increasing boost pressure or changing the engine calibration.
As the fuel passes through the catalytic core, active ferric-oxide particles are generated in the fuel stream. These particles support faster and more complete oxidation during combustion, helping the engine extract more useful energy from the same fuel.
Performance feel, not artificial tuning
The benefit is usually experienced as improved drivability: sharper throttle response, smoother acceleration and stronger low- and mid-range torque feel, depending on the engine, fuel quality and operating conditions.
Sharper throttle response
More complete combustion can help the engine respond more cleanly when the accelerator is pressed.
Stronger low- and mid-range feel
Useful torque may build more easily in normal driving, especially during acceleration from lower RPM.
Smoother engine operation
More stable combustion can reduce hesitation and vibration, giving a more refined driving feel.
Lower HC and CO
Reducing unburned hydrocarbons and carbon monoxide helps the exhaust system work under cleaner conditions.
Important: O3 Protegelo does not mechanically increase engine size, turbo boost or injection quantity. In some applications, dynamometer testing may show improved torque or power delivery across parts of the RPM range, but results depend on engine design, ECU calibration, fuel quality, vehicle condition and test method.
FAQ
Common technical questions.
Does it require additives?
No. O3 Protegelo does not use fuel additives or a dosing system. The ferric-oxide particles are generated directly within the fuel stream by the device itself.
Does it modify the ECU?
No. It has no electronic connection and does not require software or engine calibration changes of any kind.
Can it be used on larger engines?
Yes, subject to correct sizing, fuel-flow assessment and installation layout.
How long does it last?
The cartridge service life is approximately 2.5 years from first fuel contact, after which it should be replaced.
Can it work with HVO or biodiesel?
Yes. It is designed for diesel, gasoline and other liquid fuels, including HVO and biodiesel blends.
Will results be identical on every engine?
No. Results depend on fuel, engine condition, duty cycle, baseline emissions and maintenance status. Independent testing before and after installation is the recommended approach.
How it works
Passive upstream combustion improvement.
Fuel passes through O3 Protegelo before entering the engine. During fuel flow through the device, very small ferric-oxide particles are generated within the fuel stream.
Ferric oxide is a known combustion-promoting material. O3 Protegelo differs from additive-based approaches because the device generates the particles directly in the fuel, without requiring a chemical additive or dosing system.
- Works before combustion — not in the exhaust system
- Supports improved ignition behaviour and flame propagation
- Supports reductions in HC, CO and particulate formation
- NOx response depends on engine design, calibration and operating conditions
Installation
External installation on the low-pressure fuel line.
Installation location depends on the engine, fuel-line layout, available access and service space. For most applications, the feed fuel line after the main filter is preferred.
- No ECU access required
- No exhaust-side modification
- No additive tank or dosing system
- Correct line selection, fitting size, torque and bleeding must be verified
- Marine and large-engine installations may use a full-bore bypass
Product range
Sized by engine displacement and fuel throughput.
Final sizing is based on engine displacement, fuel consumption, duty cycle, fuel-line layout and installation configuration. Contact us for a recommendation.
O3 MOTORCYCLE
In-tank model for motorcycles, scooters, outboards and small engines where fuel-line access is limited.
Up to 1.0 L
O3 CAR
Model for small engines, light equipment and passenger vehicles.
Up to 2.0 L
O3 VAN
Model for light commercial vehicles and non-road equipment.
2.0 – 4.0 L
O3 PRO
Model for heavy-duty vehicles and machinery — the most widely installed product in the range.
4.0 – 15.0 L
O3 PRO DUO
Designed for large engines and continuous-duty applications.
15 – 32 LPARALLEL
Parallel installation
Larger engines can use O3 PRO / O3 PRO DUO units in parallel according to fuel flow and layout.
32 L+Documents & Support
Technical documents, reports and trial support.
Installation documents are available immediately. Emissions reports, dyno reports and case studies are shared during technical review.
Installation & User Manual
Compatible fuels, applications, service life, safety, installation locations, fittings, commissioning and operational notes.
Download manualInstallation Checklist
Quality-control record covering asset details, fuel system checks, line selection, fittings, torque and commissioning.
Download checklistTroubleshooting Guide
Diagnostic support for installers, workshops and distributor technical teams after installation.
Download guideEmissions Reports
Before-and-after emissions reports from multiple engine applications. Available on request for qualified technical reviews.
Request reportsCase Studies
Transport, industrial, marine and port-equipment case studies available for distributor and fleet discussions.
Request case studiesInstallation Videos
Videos showing installation principles and product-specific installation examples for each application.
Watch videoDistribution
Official distribution and export support.
Outside Spain, O3 Protegelo works through authorised distributors who provide local sales, installation guidance and customer service.
Become a distributor
Expanding our international network
We are looking for partners in marine, construction, port equipment, transport fleets, power generation and ground-support equipment across Europe and Asia.
- Technical training and installation guidance
- Test protocols and measurement support
- Marketing materials and product documentation
- Direct sales and technical support from Spain
Spain
Official distribution and support for Spain.
Email: comercial@o3protegelo.es
Singapore & Malaysia
Official distribution and support for Singapore and Malaysia.
Website: o3eco.com
Benelux
Official distribution and support for the Benelux market.
Website: www.dlsbv.nl
Hong Kong
Official distribution and support for Hong Kong.
Website: www.galagold.hk
Taiwan
Official distribution and support for Taiwan.
Chi Tat Marine Co. Ltd.
Tel: +886-2-2700 6918
Export Enquiries
For international enquiries, distributor discussions and trial protocols.
Email: export@o3protegelo.es
WhatsApp: +34 603 96 82 22
Contact
Get in touch
For sizing assistance, distributor enquiries, trial protocols or technical questions — fill in the form and we will respond promptly.
Email
export@o3protegelo.es
WhatsApp
+34 603 96 82 22
Why the name?
O3 Protegelo — protecting the environment from ozone formation.
The name refers to protecting the environment from ground-level ozone, which can be formed by reactions between nitrogen oxides (NOx) and unburned hydrocarbons (HC) in polluted air. O3 Protegelo works at source — improving combustion quality and reducing incomplete combustion products before they leave the engine.