Cummins 2027 X15 engine debuts at TMC with up to 605 HP, 2,050 lb-ft of torque, and an updated aftertreatment system.

Cummins’ 2027 X15 brings a new engine design and updated emissions system to meet stricter NOx rules while maintaining performance.

X15 diesels showed quick throttle response and strong acceleration on the TRC's tracks. Engine brakes were impressively strong, even at low rpm's. A parade of X15-powered tractor-trailers led the ...

New approval for Valvoline Premium Blue One Solution Gen2 allows fleets running Cummins X15 engines to extend oil drain intervals by up to 25,000 miles -- reaching intervals as high as 100,000 miles.

COLUMBUS, Indiana—To comply with 2027 emissions regulations, new powertrains must make performance compromises. Despite the added weight and backpressure of a larger aftertreatment system, Cummins' ...

[Stay on top of transportation news: Get TTNews in your inbox.] Cummins will delay the launch of its latest X15 diesel engine for the heavy-duty on-highway truck market until late 2026, citing ongoing ...

Cummins took the time recently to answer questions about their growing portfolio of engines (including the soon-to-be-launched X12 and the highly successful X15), electric powertrains and renewable ...