AUSTIN, Texas — Peterbilt Motors Co. has announced a series of updates to its lineup of proprietary Paccar engines.
The manufacturer announced from the American Trucking Associations Management Conference & Exhibition here that it will offer two new ratings on the MX-13 engine for the 2019 model year: a 455-horsepower “multitorque” version with variable torque ratings of 1,650 and 1,850 pound-feet, and a 405-horsepower version with 1,650 pound-feet of torque.
On the multitorque model, the lower torque rating is available in lower transmission gears, and the higher rating comes on in higher gears, Peterbilt told Transport Topics.
Both updates are designed to improve reliability and fuel economy. The 405-horsepower version, when paired with Paccar’s 40k rear axle, is tailored specifically for fuel economy for longhaul applications, the company said.
“Peterbilt and Paccar Powertrain work closely to ensure Peterbilt customers have the most fuel-efficient options available, and they already benefit from a total weight savings of more than 500 pounds when spec’ing the full Paccar Powertrain on the Model 579,” said Peterbilt’s on-highway marketing manager, Wesley Slavin. “Peterbilt’s customers have challenged us to find even more ways to maximize fuel economy, and these new ratings deliver.”
The new engine ratings will be available in January.
Peterbilt, a unit of Paccar, is headquartered in Denton, Texas.