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' ...

Cummins released details of its 2027 X15 diesel engine, which it says meets EPA 2027 emissions requirements while improving fuel economy — and without adding weight or using more diesel exhaust fluid.

Cummins brings the 2027 X15 into real fleet conditions to show how performance, efficiency and support work in daily ...

Cummins officially pulled back the curtain on its 2027 X15 diesel engine at the ATA’s Technology & Maintenance Council (TMC) Annual Meeting in Nashville. The 15-liter 2027 X15 offers ratings of up to ...

Cummins’ EPA 2027 X15 features a larger two-piece SCR system to meet lower NOx limits while keeping overall system weight neutral. The engine is rated up to 605 horsepower and 2,050 pound-feet of ...

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 ...

Cummins has been planning to debut a diesel-powered version of the engine in its X15 fuel agnostic platform in early 2026, yet with changes to environmental regulations this year, the company is ...