Cummins goes for big power, low emissions with all-new X-Series heavy-duty diesels

Calling its new-generation X series heavy duty diesel engines symbolic of a “new era at Cummins,” executives and engineers for the Columbus, IN-based engine maker said the X Series lineup hits the big- and medium-bore market with a combination of class-leading power ratings and the ability to meet federal Phase 1 greenhouse-gas (GHG) and fuel-efficiency standards slated to begin next year.

The 2017 X Series inline 6-cylinder engine line is comprised of the X12 with a 12-L displacement and the big-bore X15, a 15-L version of the new engine platform that comes in two variants, X15 Performance Series and X15 Efficiency Series. The X12 has 350-475 hp ratings; the X15 Performance range runs from 485-605 hp, while the Efficiency variant offers 400-500 hp ratings combined with what Cummins believes will be game-changing fuel-efficiency potential.