Knight Transportation, Cummins, and Clean Energy demonstrate potential of natural gas powertrains in California

October 6, 2023. Knight Transportation, Inc. has been successfully testing Cummins’ new X15N natural gas engine in Southern California, USA – realizing NOx and greenhouse gas reductions without compromise to performance.

The truck is fueled exclusively with Clean Energy Fuels Corp. ultra-low carbon renewable natural gas (RNG) anchored by Clean Energy’s station in Carson, California.

“Our customers rely on us to deliver a wide range of loads critical to their businesses,” said Dave Williams, Knight-Swift Transportation’s Senior Vice President of Equipment and Government Relations. “We must ensure we are utilizing the most reliable and efficient technologies possible that help us reduce our carbon footprint,” Williams continued. Knight Swift’s goal is to reduce CO2 emissions generated from the KNX fleet by 50 percent by 2035.

Coming to market in 2024, the Cummins X15N natural gas engine delivers diesel-like ratings as well as durability and reliability to allow fleets to significantly reduce their carbon footprint without sacrificing capability. The X15N offers the industry a solution toward achieving their sustainability goals, including the ability to run on renewable natural gas.

“Arizonans understand how critical equipment costs are to running a business. Renewable natural gas is something we can utilize now with very measurable benefits to both the environment and the economy. This investment will help Arizona truckers adopt low-cost advanced technology,” said Congresswoman Debbie Lesko, who represents Arizona’s 8th Congressional District and serves on the U.S. House Committee on Energy and Commerce.

The field testing with Knight-Swift will continue through full production of the X15N powertrain in 2024.