Detroit DD13 Engine

Technology ahead of its time

The DD13® engine builds upon the Detroit industry-leading heavy-duty engine legacy and proven technologies to bring efficiency and performance to the next level. The DD13 engine offers the best of the best in cutting-edge diesel engine technology and engineering, resulting in the most reliable diesel engine for your truck.

Its features include:

  • A swirl piston design for better combustion
  • State-of-the-art turbo for rapid torque performance
  • Advanced thermal management for extended idle
  • Low load PTO operation for fewer regens
  • Extended DPF service intervals for maximum uptime
  • Greater fuel efficiency than ever before
  • Increased downspeeding with IDP ratings
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1250-1850 LB-FT

1750 LB-FT


781 CU IN (12.8 L)

781 CI OR 12.8L

The DD13 takes the reputation of the DD15 to new heights.

The DD13 builds upon proven Detroit® technology to offer industry-leading power and productivity in this 6-cylinder engine.


  • Versatility for a wide range of applications.
    • New power ratings, greater application coverage, and available front and rear engine power take offs (FEPTO / REPTO)
  • Greater reliability than ever before.
    • Engineered to offer less complexity and more durability in many of its key components, the DD13 achieves an even higher standard of reliability.
  • Longer maintenance intervals.
    • The new Detroit® Aftertreatment System does more with less. This new ATS features a single, larger Diesel Particulate Filter (DPF) with Asymmetric Cell Technology for increased service intervals and 60-pound weight savings in a smaller housing. The new ATS works hand in hand with the Detroit Heavy Duty Platform of engines through techniques such as Asymmetric Injection and Auto-Elevate to ensure optimal temperatures, leading to fewer regens. When paired with the Detroit® Vocational or Highway Series of DT12® transmissions, the engine can also ThermoCoast, keeping temperatures up during low load driving.
  • Better combustion for better fuel economy.
    • Ultra-high compression ratios combined with a new swirl piston design and a new, 10-pin injector create better combustion, reduce ash production, and improve fuel economy by up to 4.0 percent.
  • Detroit’s trusted service and technology.
    • Detroit’s #1 service network, along with the Detroit Connect Virtual Technician® remote diagnostic system, helps maximize uptime.


  • Enough power to get payloads moving quickly.
    • A simple, ball bearing, fixed Geometry Turbo allows peak power and torque to be reached faster, which gets payloads moving without compromising efficiency.
  • Longer maintenance intervals.
  • Better combustion for better fuel economy.
  • Versatility to be used in a wide range of applications.
  • Greater reliability than ever before.
  • Detroit’s trusted service and technology.

*When paired with IDP ratings

Other new features and enhancements include:

  • Performance and Robustness
    • Cooling System Optimization
    • Block Improvements
    • Oil System Enhancements

The DD13 engine meets Greenhouse Gas Protocol for 2021.

Model Options

Designed for a range of on-highway and vocational applications.

M2 112 Plus
114SD Plus
Western Star
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Detroit Connect Virtual Technician

Detroit Connect®, a suite of proprietary connected vehicle solutions, is designed to improve your bottom line. Detroit Connect provides fleets and owner-operators services and tools to improve uptime, fuel efficiency, safety, and performance. These tools provide you information about their vehicle they can’t get anywhere else to better manage their business operations.

The Detroit Connect Virtual Technician® remote diagnostic service takes the guesswork out of engine repair. When a truck’s check engine light illuminates, data is collected immediately, providing a technical snapshot of the engine’s status before, during, and after a fault code event.

This information is sent to you and to the Detroit Customer Support Center (CSC), where a trained representative can diagnose the issue, recommend service and even contact the nearest authorized locations with parts in stock. The CSC can tell you if you need to pull over so you don’t cause further damage, or if you can stay on the road.

Keep running

With the longest service intervals in its class and an easily serviceable design, the Detroit® DD13® lowers your cost of ownership by decreasing your time in the shop. With oil and fuel filters positioned above the frame rails, you'll be back in the driver's seat fast.


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Maintenance Intervals


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