The X15 is an efficient use of your money, with the best resale value of any engine in the industry. It all adds up to Total Cost of Ownership that puts your fleet miles ahead of the competition.

Lower RPM. Bigger Savings.

The 2020 X15 Efficiency Series takes advantage of refinements to its big-bore design and integration with transmissions to deliver better fuel economy with reduced Greenhouse Gas (GHG) emissions. Increased downspeeding means your drivers get all the performance they are used to at lower RPM. Not only does this reduce fuel consumption and emissions but engines that run at consistently lower speeds last longer with less wear and tear.

New EX Ratings. Up to 5% Fuel Economy Improvement.

Cummins new EX ratings feature the Endurant™ transmission from the Eaton Cummins joint-venture. As part of the Cummins integrated power portfolio, the EX ratings leverage technological synergies to deliver high fuel economy and smooth operation with extended service intervals. Bundled hardware and software makes spec’ing easier and more time-efficient. The value that Cummins is bringing to the trucking industry goes well beyond engine hardware. Rookies drive like pros with the fuel saving technologies offered on the X15 Efficiency Series.The EX ratings are specifically designed for long-haul, cost-sensitive fleets. Advanced features make it easier for novices and experienced drivers alike to achieve not only the best fuel economy, but experience improved drivability and performance for better trip time and overall operational efficiency. Features that are exclusive to the X15 EX ratings include: Predictive Shifting, On-Ramp Boost, Predictive Braking and Dynamic Power. EX ratings require use of GPS data as well and pairing the X15 Efficiency Series with the Endurant transmission.

The Best Gets Even Better.

The X15 ratings for 2020 offer upgraded turbocharger aerodynamics and a high performance EGR cooler for overall air handling improvements for greater efficiency throughout the system. And, with changes like reduced water pump speed, there’s an overall reduction in parasitic losses throughout the system.

Uptime. All The Time.

When you purchase a piece of Cummins-powered equipment, you’re getting more than just a powerful, reliable and durable engine. You’re getting advanced technology and 24/7/365 coverage from Cummins Care, the most extensive and competent parts and service network (over 3,500 locations) in North America. X15 engines are equipped with our proven Connected Diagnostics system for rapid analysis if a fault is triggered. Connected Calibrations,™ our Over-the-Air (OTA) engine customization technology, lets you upgrade your engine calibration on the job site. There’s no need to visit a dealer to get the latest configuration. Everything we do is designed to reduce downtime and increase productivity – because that’s the fastest route to greater profits.