Clean Energy Fuels Corp. (NASDAQ: CLNE), the largest provider of renewable natural gas (RNG) for the transportation industry, has announced the launch of its second heavy-duty truck demo program, featuring the 2026 Freightliner Cascadia Gen 5 day cab equipped with the Cummins X15N natural gas engine.

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Clean Energy's Freightliner Cascadia Gen 5 demo truck with Cummins X15N natural gas engine.

The new truck will be showcased at the American Trucking Associations' Management Conference & Exhibition (ATA MCE) in San Diego from October 25–28, offering attendees an exclusive preview before the program launches with its debut fleet partner, Airgas.

This new program builds on the success of Clean Energy's first Peterbilt X15N demo truck program which was launched last year. The first demo truck has been praised by fleets who have operated it for the engine's smooth handling through different terrains, impressive torque, per gallon savings running on RNG, and fuel efficiency, reinforcing the X15N's potential to reshape the future of low-carbon heavy-duty trucking.

"Through one of the most tumultuous times in the history of the freight industry with evolving regulatory changes, impacts of tariffs, and overall economic uncertainty, the X15N/RNG solution has come out a clear winner for both carriers and shippers," said Chad Lindholm, senior vice president at Clean Energy. "The Cummins X15N truly is a game-changer, providing equivalent power and torque as its diesel equivalent, yet allowing fleets to claim significant carbon and NOx emission reductions with a fuel that is priced at a big discount to diesel. The reason we have a waiting list to test our demo trucks is because despite regulatory easing, operators of fleets and their customers continue to want to have the cleanest trucks. Viable electric and fuel cell options are years and years from becoming an affordable reality. RNG is the only solution that is here today, affordable, and clean."

Clean Energy's demo truck program will give fleets across the country the opportunity to experience first-hand the capabilities of the Freightliner Cascadia Gen 5 equipped with the X15N. Participating carriers will be able to fuel at Clean Energy's network of RNG stations nationwide, showcasing the ease of integrating low-carbon fueling into their own fleet operations.

The Cummins X15N engine is designed to run on RNG – a biogenic fuel derived from organic waste such as dairy manure. It offers a powerful, reliable, cleaner alternative to diesel, and fleets fueling with RNG can reduce emissions by more than 300 percent, achieving negative carbon-intensity results, while spending less per gallon of fuel.

The X15N is quickly earning a reputation for performance and sustainability with major carriers including Walmart, Amazon, UPS, FedEx, Werner, Knight Swift, Food Express, Cemex and Mullen Group having placed orders for the new engine.

The demo truck will travel through key freight corridors in California, Texas, Arizona, Illinois, Ohio, Michigan, Pennsylvania, Florida, and other states, allowing large and mid-sized fleets to try and test the engine's capabilities in real-world conditions. The program is expected to run through 2028 or longer, as demand and interest continue to grow.

For more information about Clean Energy's demo truck program, please visit: www.cleanenergyfuels.com/x15n

About Clean Energy

Clean Energy Fuels Corp. is the country's largest provider of the cleanest fuel for the transportation market. Our mission is to decarbonize transportation through the development and delivery of renewable natural gas (RNG), a sustainable fuel derived by capturing methane from organic waste. Clean Energy allows thousands of vehicles, from airport shuttles to city buses to waste and heavy-duty trucks, to reduce their amount of climate-harming greenhouse gas. We operate a vast network of fueling stations across the U.S. and Canada as well as RNG production facilities at dairy farms. Visit www.cleanenergyfuels.com and follow @ce_renewables on X and LinkedIn.

Forward-Looking Statements

This news release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934 that involve risks, uncertainties and assumptions, including without limitation statements about: the scope and timeframe of the demo truck program; the characteristics and performance of natural gas engines and trucks; the potential development of the market for RNG; the availability of environmental, tax and other government regulations, programs and incentives; the impacts of legislative and regulatory developments; and the environmental and other benefits of Clean Energy's fuels. Actual results and the timing of events could differ materially from those anticipated in these forward-looking statements. The forward-looking statements made herein speak only as of the date of this press release and, unless otherwise required by law, Clean Energy undertakes no obligation to publicly update such forward-looking statements to reflect subsequent events or circumstances. Additionally, the reports and other documents Clean Energy files with the SEC (available at www.sec.gov) contain risk factors, which may cause actual results to differ materially from the forward-looking statements contained in this news release.

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Clean Energy Media Contact:

Kimberly Fleer

1-949-437-1447

Kimberly.Fleer@cleanenergyfuels.com

Clean Energy Investor Contact:

Thomas Driscoll

Thomas.Driscoll@cleanenergyfuels.com

1-949-437-1191

Clean Energy to Launch New Freightliner X15N Demo Truck Program at ATA's MCE in San Diego