End Of Diesel? A Truck Brand Started Producing Engines Powered By CNG And LNG, Promising To Revolutionize The Heavy Transport Sector. See How This Change Can Impact The Future Of Fuels In Trucks.
The automotive industry, especially in the heavy transport sector, is increasingly committed to environmental sustainability. Recently, Kenworth, a renowned truck manufacturer, announced a significant innovation in this field: the new Cummins X15N natural gas engine. The engine promises to have a long-distance range similar to that of diesel.
The trend is for this engine to be lighter than diesel engines. This advancement not only promises to reduce greenhouse gas emissions but also introduces a new era of efficiency for heavy trucks, combining power and sustainability.
The New Cummins X15N – Future Of Trucks

The Cummins X15N is the first 15-liter engine on the market to operate on Compressed Natural Gas (CNG) or Liquefied Natural Gas (LNG).
-
It surpassed the T-Cross, Creta, and Tracker: with nearly 8,000 units sold, the Volkswagen Tera was the best-selling SUV in March 2026.
-
Honda performs miracles in fuel consumption with a hatch that marks 13.2 km/l in the city and 15 km/l on the highway, leaving Polo, HB20, 208, and Onix behind and becoming a reference among compact cars without resorting to turbo or hybrid systems.
-
Six diseases that seem common but can prevent the renewal of the driver’s license for the elderly throughout Brazil and surprise experienced drivers — could any of them affect you without showing clear signs?
-
With 122 hp, fuel consumption of up to 17.7 km/l, and a trunk capacity of 440 liters, this hybrid SUV impresses even though it costs up to R$ 47,000 more than the Yaris — meet the Toyota Corolla Cross.
Designed to deliver between 400 and 500 hp and up to 1,850 lb.-ft. of torque, the X15N stands out for delivering performance similar to traditional diesel engines, but with a lower environmental impact.
This makes the X15N an attractive option for short, medium, and long-distance operations, expanding its use across a wide range of applications.
Kevin Haygood, assistant general manager of sales and marketing at Kenworth, stated: “We are excited to soon begin production of Kenworth trucks with the Cummins X15N natural gas engine. This new engine offering will be a great alternative solution for customers looking to reduce emissions without sacrificing power.”
Emission Reduction And Compliance With Strict Standards
One of the main attractions of the X15N is its ability to meet the stringent emission requirements set by the United States Environmental Protection Agency (EPA) and the 2024 CARB Low NOx standards, which regulate nitrogen oxide emissions.
Compared to Cummins’ 12-liter engines, the X15N offers up to a 10% improvement in fuel economy and is the first large-scale solution that aligns with these standards. Kenworth has become a pioneer by being the first major manufacturer to adopt this technology in compliance with CARB standards.
José Samperio, vice president of Cummins for North America, emphasized: “The X15N delivers the performance, durability, and power needed for a variety of heavy-duty applications, making it an excellent alternative for fleets seeking to significantly reduce their carbon footprint.”
Flexible Fuel System And Refueling Infrastructure

Trucks equipped with the X15N engine have the option to choose from various natural gas fuel systems.
Customers can opt for factory configurations with the Hexagon Agility CNG/RNG system or the Cummins Clean Fuel Technologies system.
Additionally, there are fuel options mounted on the chassis and the body, providing flexibility and autonomy to vehicles, with storage capacity of up to 175 diesel gallon equivalents (DGE).
The refueling infrastructure for natural gas also proves to be robust and growing. In the United States, for example, there are over 1,500 CNG refueling stations, along with the possibility of private installations at companies and garages.
These options help maintain stable fuel costs, especially for fleets that return to base daily, eliminating the need to rely on public stations.
Economic Benefits And Sustainability Of The X15N
In addition to promoting a significant reduction in emissions, the Cummins X15N has been developed to maximize truck uptime.
With remote monitoring capabilities, real-time calibration, and other digital features, the engine aims to minimize downtime and keep operations running smoothly.
Furthermore, it is equipped with a maintenance-free three-way aftertreatment system, further simplifying its use and reducing the total cost of ownership.
From a sustainability perspective, the X15N offers a 90% reduction in carbon dioxide (CO2) and nitrogen oxides (NOx) emissions, meeting the current strictest standards. When fueled by Renewable Natural Gas (RNG), the engine has the potential to reduce CO2 emissions by up to 97%, an impressive feat that underscores its commitment to environmental sustainability.
More Advantageous Than Diesel

The use of natural gas in trucks offers several advantages over diesel, particularly regarding sustainability and cost savings.
Natural gas emits less carbon dioxide (CO₂) and other air pollutants, such as nitrogen oxides (NOx) and particulates, significantly contributing to reducing the carbon footprint.
Additionally, the cost of natural gas tends to be more stable and, in many cases, lower than diesel, allowing fleets to save on fuel costs in the long run.
Another important advantage is the reduction of noise, as natural gas engines operate more quietly, making them ideal for urban areas and regions with noise restrictions.
Adaptation And Integration With Modern Technologies
The Cummins X15N has been designed to integrate efficiently with existing service networks, allowing for a smooth transition for companies looking to adopt this new technology. The engine is compatible with automated transmissions such as the Eaton Cummins Endurant and the Cummins Clean Fuel Technologies fuel supply system, resulting in a fully optimized powertrain.
Moreover, the X15N features advanced connectivity, offering remote diagnostics and over-the-air software updates.
Digital tools like Cummins’ Guidanz assist in maintenance and workflow management, providing a faster and more productive service experience.
Partnerships And Initiatives For The Expansion Of Natural Gas In Transport
To further enhance the positive impact of the X15N, Cummins and Kenworth have established partnerships with various companies and fuel suppliers, encouraging the large-scale adoption of natural gas.
With the support of companies like Hexagon Agility, which develops CNG/RNG fuel systems for heavy trucks, the refueling infrastructure continues to expand, facilitating access to natural gas and promoting its use.
Eric Bippus, vice president of Hexagon Agility, commented: “Over the past two decades, Kenworth has been instrumental in providing clean fuel solutions for heavy truck fleets. Together, we are driving the adoption of affordable sustainability solutions.”
The Future Of Trucking
With a range of economic, environmental, and operational benefits, the Cummins X15N is poised to play a crucial role in the transition of heavy transport to a more sustainable future.
Cummins’ strategy to create a global fuel-agnostic engine platform, which will eventually include diesel and hydrogen, indicates a continued commitment to innovation and emission reductions.
By combining fuel efficiency, operational flexibility, and compliance with the strictest environmental standards, the X15N sets a new benchmark for heavy truck engines. This technology not only provides an immediate solution for reducing emissions but also paves the way for future innovations in the heavy transport sector.
Construction Of The First Natural Gas Engine Initiated
Cummins announced the start of full production of the X15N natural gas engine at its facility located in Jamestown, United States.
The X15N is the first 15-liter engine designed to operate on natural gas, providing flexibility for various heavy-duty applications, such as freight transportation and service trucks.
The engine has been extensively field-tested before full production, demonstrating good performance for customers. “This engine is performing well as it is integrated into our customers’ operations,” said Lyndon Jones, executive director of North American Roads at Cummins Inc. He stated that full production will allow more engines to be utilized in customers’ trucks, helping to efficiently reduce emissions.
Before reaching full production stage, the X15N underwent rigorous testing with some of North America’s largest line-haul, regional, and vocational transport fleets. These evaluations took place under challenging operating conditions, highlighting the engine’s robustness and reliability.

Excelente Diretriz para a redução de emissões e custo por km rodado.!
Caminhões europeus e chineses já estão produzindo esses motores já alguns anos.
A Scania está com caminhões a GNV e GNL rodando a mais de três anos