Werner Enterprises to Integrate Cummins’ 15L Natural Gas, Hydrogen Engines
Werner Enterprises will begin validation and integration of Cummins’ 15-liter natural gas and 15-liter hydrogen internal combustion engines in its heavy-duty trucks.

The Cummins 15-liter natural gas engine was announced in October 2021.
Photo: Cummins
In the second half of 2022, Werner Enterprises will begin validation and integration of Cummins’ 15-liter natural gas and 15-liter hydrogen internal combustion engines in its heavy-duty trucks.
This collaboration will help Werner meet its sustainability and operational targets while providing Cummins operational and performance data to help us optimize our product offerings, explained Amy Boerger, Cummins’ vice president and general manager, North America, in a press release.
"These collaborations allow us to refine and optimize our technologies to make the shift to zero-emissions commercial transportation solutions across diverse markets much more quickly,” she said.
The 15-liter natural gas engine was announced in October 2021 can be paired with a Cummins Eaton Automated Transmission Technologies Endurant HD Transmission and Cummins Fuel Delivery System, ensuring a fully integrated natural gas powertrain. Other transmission pairings will be available at launch for specialized applications.
The 15-liter engine will offer ratings up to 500 horsepower and 1,850 ft-lbs of torque, while not requiring selective catalytic reduction to meet 2024 California or Environmental Protection Agency emission standards, providing a potentially carbon-negative solution when powered with renewable natural gas.
Hydrogen engines offer OEMs and end-users the benefit of adaptability by continuing to use familiar mechanical drivelines with vehicle and equipment integration. This mirrors current powertrains while continuing to provide the power and capability for meeting application needs. Additionally, the 15-liter hydrogen engine can use zero-carbon green hydrogen fuel, produced by Cummins-manufactured electrolyzers.
"The options Cummins is providing align with our longstanding focus on sustainability and reducing our carbon footprint,” said Derek Leathers, chairman, president and CEO of Werner Enterprises “They understand the priority we place on using technology to minimize our impact on the environment. By being proactive now, we are ensuring a better future for everyone, and I look forward to this collaborative effort.”
More Fuel Smarts

New Agentic Predictive Maintenance Report Demonstrates How Degraded Aftertreatment Systems Waste Fuel
Questar analyzed a large mixed-class fleet and discovered it was wasting as much as $30 in fuel per vehicle, per day, because of mechanically degraded aftertreatment systems.
Read More →
New York City's Microhub Project is Delivering Results
Trucking, last-mile delivery companies, and environmental advocates like what they are seeing so far with New York's microhub program.
Read More →
Lessons Learned About Alternative Fuels: Start Small, Stay Flexible
Practical advice on adopting alternative fuels and ZEVs from HDT's 2026 Top Green Fleets, from renewable diesel and natural gas to electric trucks.
Read More →
Kempower Adds Flex EV Charger to Help Support Transition to Megawatt Charging
The Kempower Mega Satellite Flex has both a CCS and MCS connector, allowing operators to serve both types of heavy-duty vehicles.
Read More →
Hino Adds Electric Class 6/7 Truck
Hino says the Le Series is an important step in the company's efforts to reduce environmental impact and support its customers’ sustainability goals.
Read More →
Can Multi-Speed EV Transmissions Solve Heavy Trucking’s Biggest Electric-Vehicle Problems?
A startup called Sigma Powertrain believes purpose-built multi-speed gearboxes can boost efficiency, reduce battery size and improve gradeability for heavy-duty battery-electric trucks.
Read More →
Hendrickson Debuts Electraax E-Axle for Medium-Duty Trucks
Developed with Driventic, Hendrickson's new integrated e-axle is designed to improve efficiency, reduce weight, and extend range in Class 6-7 EV applications.
Read More →
50 Ways Fleets Can Cut Fuel Costs Now — Without Buying New Trucks
Fuel savings don’t come from one big change. They come from dozens of small ones. Here’s how leading fleets are stacking gains across drivers, routing, maintenance, and more.
Read More →
Top Green Fleets 2026: How Fleets Are Reducing Emissions in the Real World
What works in sustainable trucking today? Heavy Duty Trucking's Top Green Fleets are finding practical ways to cut fuel use, reduce emissions, and keep freight moving.
Read More →
California Launching $1 Billion Electric Truck Rebate Program
CARB says the California Clean Fuel Reward program will begin offering point-of-sale rebates of up to $120,000 for electric commercial trucks starting June 26.
Read More →
