Cummins to launch fuel-agnostic X10 in North America in 2026

In Indiana, Cummins Inc. announced 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 new X10 diesel will emit 75 percent less NOx emissions than required at launch in 2026. It will be compliant to the U.S. EPA’s 2027 regulations while providing a step change in fuel economy improvement. The X10 architecture uses a belt-driven, high output 48-volt alternator and aftertreatment heater solution optimized for increasingly stringent emission standards, and will be scalable to other advanced combustion technologies. For further reductions in carbon emissions, customers may choose to use B20 or renewable diesel.