Cummins announced Monday that its fuel-agnostic 10-liter engine will launch in North America in 2026.
Positioned to replace both the L9 and X12, the bi-voltage X10 will roll out first as a diesel-fueled variant intended for both medium- and heavy-duty applications.
The new X10 diesel will emit 75% less NOx than required by the EPA’s 2027 regulations. Cummins reports that fleets can opt for bio and renewable diesel to further reduce emissions.
In addition to a greener footprint, the engine will “provide a step change in fuel economy improvement,” according to Cummins on-highway communications director Katie Zarich. Extended maintenance intervals are expected to reduce downtime in the shop.
[Related: Cummins says fuel-agnostic engines will cut maintenance, increase sales]
The X10 will use both 12- and 48-volt systems. The aftertreatment heater will operate on a “48-volt system separate from the rest of the vehicle,” Zarich said. A high-output, belt-driven 48-volt alternator will power aftertreatment.
