"This new engine offering will be a great alternative solution for Kenworth customers seeking to reduce emissions in applications that require the power and performance they're accustomed to with diesel engines. The Cummins X15N meets stringent EPA emission requirements and CARB 2024 Low NOx standards and features up to a 10% improvement in fuel economy over Cummins' 12-liter natural gas engine with similar rating and duty cycle. "We're pleased to partner with Kenworth and PACCAR to deliver the industry's first trucks with this new 15-liter natural gas engine," said José Samperio, Cummins vice president and general manager for North America. "The X15N delivers the performance, durability, and power required in a variety of heavy-duty and vocational applications and is an excellent alternative for fleets looking to significantly reduce their carbon footprint."