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Western Star on-highway truck is 5.8 percent more fuel-efficient than predecessor

A truck drives down a road
A Western Star 57X on-highway truck

Western Star has added the 57X on-highway truck to its X-Series. The truck joins the new Western Star 47X and 49X to complete a lineup built for productivity and efficiency.

"With the addition of the 57X, Western Star's new X-Series now rises to the next level," says David Carson, senior vice president of sales and marketing at Daimler Truck North America (DTNA). "While the 47X and 49X serve the vocational customer, the 57X was conceived, designed, and engineered specifically for owner-operators and small fleets looking for a truck that provides the safety, efficiency, durability, and prestige that only Western Star can deliver."

Efficiency of the 57X on-highway truck

The 57X is the most fuel-efficient truck Western Star has ever built. It is 5.8 percent more fuel-efficient than its predecessor, the 5700XE, while delivering ideal dependability and productivity.

The 57X gives owners a choice of Detroit engine models. The DD13 Gen 5, DD15 Gen 5, and DD16 engines all deliver proven maximum on-highway performance and fuel economy.

The 57X is available with Detroit Powertrain components including Detroit DT12 Direct or Overdrive AMT transmissions, which reduce fuel consumption and increase efficiency while improving shifting and reducing wear. Intelligent powertrain management anticipates terrain and adjusts to road conditions to further maximize efficiencies. Available Detroit front steer and high-speed ratio rear tandem axles also contribute to fuel efficiency and performance while reducing maintenance.

The powertrain efficiency is complemented by new aerodynamic improvements to the cab and chassis that help the 57X log mile after mile with less fuel consumption:

  • New aerodynamic hood and bumper with air ducts.
  • Roof and chassis fairings for the day cab, 60-inch, and 72-inch mid roof.
  • Chassis side fairings with flexible skirts specifically designed to fill the gaps between cab and chassis.
  • Aerodynamic roof fairing or adjustable aerodynamic deflector for day cab.
  • 24-inch sleeper side extenders (12-inch for day cabs).
  • Optimized drive wheel fairings smooth the airflow as it passes the trailer.
  • FlowBelow mould-in colour drive wheel covers. 
Four cab options are available for the 57X.

Safety and connectivity technology installed

The new 57X is equipped with safety and connectivity features designed to protect the driver, pedestrians, and other motorists while providing the operator with real-time information about the vehicle which helps minimize insurance costs and downtime fixing accident-related repairs.

The 57X comes standard with the Detroit Assurance 5.0 safety system with Active Brake Assist 5, an always-on system that fuses camera and radar technology to detect moving obstacles in front of the truck and can deploy full braking. With Detroit Assurance also comes Adaptive Cruise Control (ACC to 0 mph), which keeps the truck at a safe distance and provides an ideal driving experience. Detroit Assurance 5.0 also offers optional Active Lane Assist (ALA), which includes Lane Keep Assist, Auto Stop, Lane Departure Protection, and Steer Assist. Steer Assist can help reduce fatigue on the road and makes maneuvering in yards far easier. Additionally, 57X debuts Active Side Guard Assist (ASGA), a technology designed to mitigate blind side issues during right-hand turns.

Standard Detroit Connect offers a suite of connectivity systems that provide real-time, actionable insights into vehicle performance and empower better decision-making, resulting in less downtime and a better bottom line for owners.

All new for Western Star trucks, a digital dash display features a configurable instrument cluster to provide an experience similar to luxury cars. The larger screens display entertainment options such as Apple CarPlay and Android Auto (which can be accessed with a smartphone), as well as vehicle information from Detroit Assurance. Integrated steering wheel controls let drivers control most entertainment and information functions without taking their hands off the wheel.

Four cab options are available to suit any application, including day cab, 60-inch mid roof, 72-inch mid roof, or 72-inch stratosphere. All deliver ideal comfort with leather seating and, on sleeper models, an optional driver's lounge with table and Murphy bed. An easy-to-operate HVAC system, improved insulation, and a larger windshield contribute to a more comfortable driver experience.

Production is planned to begin in early Q1 2023 at DTNA's Cleveland truck manufacturing plant.

Company info

4747 N. Channel Ave.
Portland, OR
US, 97217


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