Cummins Expands X15 Line

13 September 2019

Cummins Inc. is expanding its 2020 X15 on-highway diesel engine portfolio with new Efficiency Series and Productivity Series ratings.

The 2020 X15 Efficiency Series engine delivers up to 5% better fuel economy than the prior X15 Efficiency Series engine and is designed for increased uptime and improved driver satisfaction, Cummins said. It offers oil drain intervals of up to 75,000 miles and is available in 18 ratings from 400 to 500 hp, with torque ratings from 1450 to 1950 lb. ft.

“We are proud of the performance and reliability of the X15 engine platform,” said Brett Merritt, vice president – On-Highway Engine Business at Cummins. “The new 2020 X15 Efficiency Series engine provides improved fuel economy and further reduces greenhouse gas emissions.  That’s why we’re bringing our new X15 Efficiency Series engine and X15 Productivity Series offering to the market a year ahead of regulation requirements.”

“Since the launch of the X15 platform in 2017, customers are hitting or exceeding fuel mileage targets and only performing preventative maintenance to the product. With a 2020 X15 Efficiency Series engine, customer benefits will only improve.”

The inline six-cylinder engines utilize a range of Cummins technologies, including variable geometry turbochargers from Cummins Turbo Technologies; a Cummins XPI fuel injection system offering multiple injections within one injection cycle; Fleetguard fuel and lube oil filters from Cummins Filtration; and the Cummins Emission Solutions Single-Module aftertreatment system.

In addition, Cummins said engine hardware enhancements to the Efficiency Series provide better air handling and lower friction, delivering up to 3.5% fuel economy improvements to the base engine offering.  Lower oil consumption is expected with modified liner geometry in the power cylinder.  Valve adjustments have been made for increased durability.

With standard oil drain intervals (ODI) ranging to 75,000 miles, ODIs up to 80,000 miles are available to customers using Valvoline Premium Blue 15W-40 oil. In addition, customers participating in Cummins OilGuard program have the potential to increase to a 100,000-mile ODI, the company said.

Cummins is also offering new EX ratings in the X15 Efficiency Series that can deliver up to an additional 1.5% fuel efficiency increase on top of the improvements in the X15 architecture. The new ratings contain the full suite of powertrain features that including all prior ADEPT features, along with new capabilities such as predictive gear shifting, predictive braking, on-ramp boost and dynamic power.

Powertrain features in the EX ratings are available exclusively with the X15 Efficiency Series engine when paired with the Endurant transmission from the Eaton Cummins Automated Transmission Technologies joint venture.

New Cummins X15 Productivity Series ratings target multi-purpose, vocational and heavy-haul trucking applications.

“The EX ratings represent the incredible gains that come from the integration of industry leading engine and transmission technologies,” Merritt said. “Customers, in one easy selection, receive an optimized powertrain already configured for the highest levels of efficiency and drivability.  We were able to make these improvements without compromising the power drivers demand, which means everyone wins.”

New X15 Productivity Series ratings range from 430 to 605 hp with torques of 1650 to 2050 lb. ft. and target multi-purpose, vocational and heavy-haul customers who look not only for efficiency in their powertrain, but also response and performance needed to get the job done thanks to a wider engine speed range.

The Productivity Series offering is comprised of two different engine hardware sets, common with either the 2020 X15 Efficiency Series or the X15 Performance Series, which is unchanged for 2020.


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