Cummins Inc. announces it will launch the next engine in the fuel-agnostic series, the X10, in North America in 2026. This engine, named as part of the X engine family, is uniquely positioned to replace both the L9 and the X12 with the versatility to serve both medium and heavy-duty applications. It will be compliant with U.S. EPA’s 2027 regulations a full year early. The diesel version will be first available, with other versions for gaseous fuels introduced later. This 10-liter displacement product slots into Cummins’ product portfolio complemented by the B6.7 and X15 and will serve vocational, transit, pickup and delivery and regional haul customers.
The engine can be paired with a variety of transmissions depending on the application including the Eaton Cummins Endurant to enable additional drivability benefits and efficiency gains. The engine is built on Cummins’ fuel agnostic platform. These new fuel-agnostic engine platforms feature a series of engine versions that are derived from a common base engine, which means they have some parts commonality. Below the head gasket of each engine will largely have similar components and above the head gasket will have different components for different fuel types. Each engine version will operate using a different, single fuel.
Cummins is offering a full portfolio of products in 2026 to cover the medium-duty and heavy-duty customer needs, including the new 15-liter natural gas engine, the X15N. Additionally, the B6.7 will be offered in diesel, natural gas, gasoline and propane. For more, visit www.cummins.com.