Rail
OptiFuel Total-Zero™ Diesel-RNG Dual Fuel Locomotives
No Tender Required!
At OptiFuel, customization, future transitions & on-rail maintenance come standard.
Long Range. No Tender.
6,500 gallon range capable of traveling from LA to Chicago without refueling — no tender required.
Cost Savings
Reduce fuel costs by 30-40% compared to Tier 4 diesel locomotives and enjoy lower lifetime maintenance expenses.
All the power. Zero emissions.
Achieve diesel-like power with near-zero NOx and PM emissions, plus net-zero GHG emissions.
New & Retrofit Options
Buy new or retrofit any existing switcher or line haul locomotive platform with minimal infrastructure expansion.
Superior Performance
Built for 24/7 use and 30-year life with no need for resting or recharging.
Unmatched Reliability
95% uptime and full tractive effort even if an engine fails, plus 1-hour on-track engine module replacement.
Future-Proof
Modular engineering allows easy updates as new renewable technologies emerge, helping railroads stay adaptable without high re-investment costs.
Flexible Fueling
Operate on 100% diesel or blends with up to 35% RNG, allowing railroads to achieve net-zero emissions at their own pace.
Need grant support? OptiFuel Systems actively supports railroads by providing comprehensive grant support assistance, guiding them in identifying relevant grants and facilitating the preparation of grant applications through a collaborative process. Contact us to learn more ›
Now Taking Orders
Total-Zero™ Diesel-RNG Dual Fuel Hybrid Switcher Locomotive
- 52′ (1500 hp) or 62′ (2000 hp)
- Advanced DC Traction
- Near Zero NOx (0.035) and PM (0.005) – 16 times less than Tier 4
- Zero GHG Carbon Intensity
- Up to 40% less fuel usage compared to Tier 4 locomotives
- RNG about $1.50 a DGE
- Minimal infrastructure expansion required
In Pre-Production
Total-Zero™ Diesel-RNG Dual Fuel Hybrid Long Haul Locomotive
Scheduled to Begin Testing in 2026 at FRA’s TTC – Full Production in 2028
- 80′ (5000 hp) or 72′ (4600 hp)
- AC traction system with regenerative braking
- Repowered options available
Achieve near-zero nitrous oxide (NOx) and particulate matter (PM) emissions, and NET-ZERO greenhouse gas (GHG) emissions.
Why Diesel & RNG?
Comparing Fuel Options to Decarbonize U.S. Locomotives
How do RNG, diesel, hydrogen & batteries compare in terms of power, distance and cost to transition heavy-duty fleets from diesel to clean power?
click to enlarge
Turnkey Refueling
Each Total-Zero™ Diesel-RNG Locomotive comes paired with a comprehensive refueling solution.
OptiFuel’s turnkey refueling program covers everything from delivery services to fuel stations, ensuring that customers only pay for fuel and not costly infrastructure.
Modular & Scalable Design
OptiFuel’s novel modularity makes customization, future transitions, and on-rail maintenance possible.
With 90% component modularity, modules can be quickly swapped out for upgrades or transferred between locomotives.
Performance
Reliability
Multi-engine engineering keeps locomotives running even with an engine down.
Flexibility
Affordability
Leading the Charge
The only supplier 100% focused on zero emission switcher and line haul locomotives, OptiFuel has been advancing alternative fuel technology in locomotives since 2013.
Proven Experience
OptiFuel is the only company to develop and install a CNG refueling station for rail and the first company to obtain FRA concurrence with CNG storage onboard a freight locomotive. Learn more ›
Setting the Pace of Innovation
OptiFuel’s 5000 hp Diesel-RNG Dual Fuel Hybrid line haul locomotive, set to undergo testing at TTC from 2025 to 2026, is aiming for FRA concurrence by 2027.
The Recognized Leader
Two recent CRISI awards worth $26,155,673 will support full FRA concurrence of our zero emission Diesel-RNG Dual Fuel Hybrid Switcher and Line Haul Locomotives by 2026 and 2027. Read more ›
OptiFuel is committed to rail for the long haul.
Locomotives have a 30+ year life and the most stringent performance demands of all industrial equipment. Trains haul as many as 150 cars long distances and up steep terrain — making both torque and horsepower paramount. Equipment that can meet these performance requirements is both rare and coveted.
OptiFuel’s innovative modular power system not only meets these stringent performance demands but also empowers railroads to seamlessly integrate advanced technologies, ensuring long-term reliability, adaptability, and cost-effectiveness in their operations.
The power of world-class partnerships.
Our partnerships provide customers with the most advanced and reliable technology in the world, with the assurance of long-term support, manufacturing scale, and efficient cost.
Markets We Serve:
Rail
Power Generation
Semi-Trucks
Marine
RNG Fuel Supply
