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X15
Cummins

The Cummins X15 is a premier heavy-duty 15-liter diesel engine designed for superior performance, efficiency, and reliability in demanding applications. Representing the evolution of the renowned ISX platform, this 6-cylinder inline engine offers a versatile power range tailored for different operational needs through its distinct series: Efficiency, Performance, and Productivity. Engineered to meet global emission standards, including U.S. EPA 2024 and EU Stage V, the X15 delivers robust power, advanced connectivity, and a lower total cost of ownership.
The X15 platform offers three specialized series to match your specific power and efficiency requirements.
The X15 engine's power and adaptability make it the prime mover for a diverse range of heavy-duty vehicles and equipment:
On-Highway Trucks: The primary application, powering long-haul freight tractors, regional haulers, dump trucks, and heavy-duty vocational trucks where reliability is critical.
Off-Highway & Industrial Machinery: Widely used in construction, mining, and agricultural equipment, as well as cranes and other heavy machinery requiring durable, high-torque power.
Specialty Vehicles: An ideal power source for fire and emergency apparatus, motorhomes (RVs), and equipment built by truck equipment manufacturers (TEMs).
Power Generation: Serves as a reliable prime mover for large diesel generator sets in standby, prime, and continuous power applications.
The X15 integrates Cummins' latest innovations to deliver unmatched performance and smart operation.
HELM™ Fuel-Agnostic Platform: This forward-thinking design uses a common base engine architecture, enabling optimized versions for clean diesel, natural gas (X15N), and hydrogen (X15H). This provides a practical path toward lower emissions without sacrificing performance.
Advanced XPI Fuel System & VGT Turbocharger: The ultra-high-pressure XPI (Xtra-high Pressure Injection) fuel system ensures precise, multi-event injection for superior fuel economy, power, and quieter operation. The patented Variable Geometry Turbocharger (VGT) provides rapid boost at low engine speeds for exceptional throttle response and up to 600 hp of engine braking power.
Integrated Digital Ecosystem: The engine is built for connectivity. Features like Acumen® remote diagnostics and Over-the-Air (OTA) programming allow for real-time monitoring, predictive maintenance, and remote software updates, maximizing uptime. The ADEPT™ suite with SmartCoast and SmartTorque optimizes gear selection and torque management for enhanced fuel efficiency.
Designed for Durability & Uptime: The engine features the compact, lightweight Single-Module™ aftertreatment system and offers the industry's longest service intervals—with oil drain intervals up to 75,000 miles under normal operation. This design drastically reduces maintenance frequency and cost

The Cummins X15 is a premier heavy-duty 15-liter diesel engine designed for superior performance, efficiency, and reliability in demanding applications. Representing the evolution of the renowned ISX platform, this 6-cylinder inline engine offers a versatile power range tailored for different operational needs through its distinct series: Efficiency, Performance, and Productivity. Engineered to meet global emission standards, including U.S. EPA 2024 and EU Stage V, the X15 delivers robust power, advanced connectivity, and a lower total cost of ownership.
The X15 platform offers three specialized series to match your specific power and efficiency requirements.
The X15 engine's power and adaptability make it the prime mover for a diverse range of heavy-duty vehicles and equipment:
On-Highway Trucks: The primary application, powering long-haul freight tractors, regional haulers, dump trucks, and heavy-duty vocational trucks where reliability is critical.
Off-Highway & Industrial Machinery: Widely used in construction, mining, and agricultural equipment, as well as cranes and other heavy machinery requiring durable, high-torque power.
Specialty Vehicles: An ideal power source for fire and emergency apparatus, motorhomes (RVs), and equipment built by truck equipment manufacturers (TEMs).
Power Generation: Serves as a reliable prime mover for large diesel generator sets in standby, prime, and continuous power applications.
The X15 integrates Cummins' latest innovations to deliver unmatched performance and smart operation.
HELM™ Fuel-Agnostic Platform: This forward-thinking design uses a common base engine architecture, enabling optimized versions for clean diesel, natural gas (X15N), and hydrogen (X15H). This provides a practical path toward lower emissions without sacrificing performance.
Advanced XPI Fuel System & VGT Turbocharger: The ultra-high-pressure XPI (Xtra-high Pressure Injection) fuel system ensures precise, multi-event injection for superior fuel economy, power, and quieter operation. The patented Variable Geometry Turbocharger (VGT) provides rapid boost at low engine speeds for exceptional throttle response and up to 600 hp of engine braking power.
Integrated Digital Ecosystem: The engine is built for connectivity. Features like Acumen® remote diagnostics and Over-the-Air (OTA) programming allow for real-time monitoring, predictive maintenance, and remote software updates, maximizing uptime. The ADEPT™ suite with SmartCoast and SmartTorque optimizes gear selection and torque management for enhanced fuel efficiency.
Designed for Durability & Uptime: The engine features the compact, lightweight Single-Module™ aftertreatment system and offers the industry's longest service intervals—with oil drain intervals up to 75,000 miles under normal operation. This design drastically reduces maintenance frequency and cost
