The truck and engine manufacturer Navistar and the trucking company Swift Transportation announced on Monday a joint pilot program designed to maximize fuel economy.

Navistar said it developed a specification for the International ProStar tractor that the company expects to deliver improved fuel economy results. Swift will pilot test the specification, which pairs the ProStar with the Cummins ISX15 and the Eaton Cummins Smart Advantage automated manual transmission.

“We feel the marriage of automated transmissions with complementary engine parameters will generate optimal fuel economy performance while also helping retain drivers,” said Bert Kinsel, vice president of heavy equipment, at Swift. 

No other details about the specification were disclosed in the announcement.

“Our testing shows this truck configuration provides outstanding fuel economy performance and we are confident Swift Transportation will experience the same benefits we have observed,” said Bill Kozek, Navistar president, North American truck and parts.