ENGINE OVERVIEW
Choice is a powerful thing.
In this case, literally.
One size never fits when it comes to truck engines. So we offer a range of engine choices from both Detroit and Cummins. You can pick the right amount of power for your job. And like the other 3,600 options we offer, our engines are nothing short of the best. Efficiency. Toughness. Power. Talk about getting your motor running.
The Integrated Detroit™ Powertrain
The Detroit™ Powertrain integrates three specifically-engineered Detroit components—engine, transmission, and axle—to work together and create a system of efficiency, performance, and reliability. The Detroit™ DD15® engine has been masterfully designed to reach unprecedented levels of performance, fuel economy, and reliability. The Detroit DT12™ transmission, with its automated clutch and computer-controlled shift actuator, gives you access to the power you need, while maintaining the highest possible fuel economy. Precisely-matched Detroit™ tandem 6x2 and 6x4 rear axle ratios deliver power to the pavement with minimum loss.
Pair that with one-stop parts and service support, and you'll see that no other powertrain can match the big savings the Detroit Powertrain brings to your Real Cost of Ownershipsm.
Detroit® DD15 Engine
We've designed the DD15 engine to reduce fuel consumption by integrating it with our fastest-ever tandem axles and smooth-shifting DT12 transmission. The DD15 has been calibrated to cruise at the same road speed at lower RPMs, reducing friction and fuel.
Detroit® DT12 Transmission
The DT12 transmission—linking engine to axles in the Powertrain—brings you 12 tightly-spaced speeds. It also features Intelligent Powertrain Management, which uses terrain maps to know the route ahead and create optimal fuel economy. IPM pinpoints the truck's location and looks over a mile ahead to anticipate terrain. IPM will adjust cruise control, pre-select gears, eCoast and brake the engine to maximize efficiency into the road conditions ahead.
Detroit® 6x2 or 6x4 Axles
Detroit axles provide optimum efficiency and performance when working with the DD15 engine and DT12 transmission.
Detroit DD16
600
Up To
HP

Demand More
The Detroit DD16® is made for extreme loads. Whether you're in the coal mines of West Virginia or the forests of Western Canada, this engine has the power and torque to deliver -- the powerhouse engine for the owner operator and severe-duty vocational markets.
Specifications
Horsepower | 500-600 hp |
---|---|
Torque | 1850-2050 lb-ft |
Configurations | Inline 6 cylinder |
Displacement | 952 cu. in. (15.6 L) |
Compression Ratio | 17:1 |
Bore | 5.47 in. (139 mm) |
Stroke | 6.73 in. (171 mm) |
Weight | 2837 lbs (dry) |
Electronics | DDEC |
Oil Capacity | 45.5 qt. (43 L) |
Detroit DD15
505
Up To
HP

Serious Power
The new Detroit DD15® engine delivers more with less weight, powering the evolution of a new era in efficient driving.
The DD15 is part of the Integrated Detroit Powertrain, three specifically-engineered Detroit components working together to improve efficiency, performance, and reliability.
Specifications
Horsepower | 425-505 hp |
---|---|
Torque | 1550-1750 lb-ft |
Configurations | Inline 6 cylinder |
Displacement | 903 cu. in. (18.8 L) |
Compression Ratio | 18.5:1 |
Bore | 5.47 in. (139 mm) |
Stroke | 6.42 in. (163 mm) |
Weight | 2718 lbs (dry) |
Electronics | DDEC |
Oil Capacity | 45.5 qt. (43 L) |
Detroit DD13
505
Up To
HP

BUILT FOR BOTTOM LINE PERFORMANCE.
Designed specifically for Less-Than-Truckload, Regional Distribution and Vocational applications, the Detroit DD13® diesel engine delivers serviceability, performance and fuel economy -- so you don't have to choose between an engine with great fuel economy, serviceability and performance ever again.
Specifications
Horsepower | 350-505 hp |
---|---|
Torque | 1250-1850 lb-ft |
Configurations | Inline 6 cylinder |
Displacement | 781 cu. in. (12.8 L) |
Compression Ratio | 18.4:1 |
Bore | 5.20 in. (132 mm) |
Stroke | 6.15 in. (156 mm) |
Weight | 2487 lbs (dry) |
Electronics | DDEC |
Oil Capacity | 40.2 L |
Cummins X15
600
Up To
HP

Better Every Mile
Expect outstanding driving performance and fuel economy with the Cummins X15 engine. Every element has been designed and manufactured to optimize performance, reliability and durability while delivering a low cost of operation.
Specifications
Horsepower | 400-600 hp |
---|---|
Torque | 2050 lb-ft (max) |
Configurations | Inline 6 cylinder |
Displacement | 15 L |
Compression Ratio | |
Bore | |
Stroke | |
Weight | 3186 lb (1448 kg) |
Electronics | |
Oil Capacity | 14 gal (52.9 L) |
Cummins X12
500
Up To
HP

Reduce Weight, Not Performance.
Having an engine that’s lightweight is only an advantage if get the job done. The X12 was designed to deliver both power and fuel economy in a package that’s hundreds of pounds lighter than comparable engines, with the performance and transient response that impresses even the most die-hard big bore drivers.
Specifications
Horsepower | 350-500 hp |
---|---|
Torque | 1250-1700 lb-ft |
Configurations | Inline 6 cylinder |
Displacement | 11.9 L |
Compression Ratio | |
Bore | |
Stroke | |
Weight | 2050 (930kg) |
Electronics | |
Oil Capacity |
Cummins L9
380
Up To
HP

Big Power in a Small Package.
The L9 is a smaller displacement engine that offers excellent power-to-weight ratios with heavy-duty features like replaceable wet liners. It also features the XPI fuel system -- the same technology that’s used in the X15. These advances allow the L9 to run stronger and with greater responsiveness than ever before.
Specifications
Horsepower | 260-380 hp |
---|---|
Torque | 720-1250 lb-ft |
Configurations | Inline 6 cylinder |
Displacement | 9 L |
Compression Ratio | |
Bore | |
Stroke | |
Weight | 1850 lb (841 kg) |
Electronics | |
Oil Capacity | 7.3 gal (27.6 L) |