Cummins Inc. is expanding its 2020 X15 portfolio with a new X15 Efficiency Series engine and the X15 Productivity Series.

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, Cummins said.

Cummins says it has an oil drain interval (ODI) of up to 75,000 for the X15 in 2020. An ODI of up to 80,000 miles is available to customers using Valvoline Premium Blue 15W-40. Cummins says customers participating in Cummins OilGuard program have the potential to increase to a 100,000-mile ODI.

The new EX ratings offered in the X15 Efficiency Series deliver expanded powertrain capabilities that can deliver up to an additional 1.5% fuel efficiency increase on top of the improvements gained through base engine hardware and feature enhancements, Cummins said.

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. 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. The 2020 X15 Performance Series contains seven ratings, with four former Performance Series ratings moving to the Productivity Series offering.

“We are proud of the performance and reliability of the X15 engine platform,” said Brett Merritt, vice president of 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.”