Detroit Diesel Series 50®: Fuel-Efficient and Cost-Effective

Powering Businesses Forward with Innovative Engine Technology

The proven 8.5L Series 50 engine is the smaller, four-cylinder version of the Series 60, with the same heavy-duty qualities. With a horsepower range from 250HP to 350HP, this was the ideal engine for applications where high torque and horsepower are demanded.

The time-tested DDEC® electronic engine control system ensures optimum performance and fuel efficiency with minimal emissions. Like all Detroit Diesel engines, the Series 50 was designed for easy and periodic maintenance to help minimize downtime and out-of-pocket cost.  Along with optimum horsepower and performance, it’s hard to beat the Series 50 from Detroit Diesel.

The Series 50 was also adopted to run on compressed natural gas (CNG) or liquefied natural gas (LNG) and became popular among transit buses in North America. The Series 50 sold 200,000 units between 1993 and 2005. It was also used extensively in trucks, motor homes, transit buses, motor coaches, construction and industrial equipment, as well as in military vehicles.

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Detroit Connect Portal

The Detroit™ Connect portal is easy-to-use, one-stop-shop for all vehicle performance data gathered, transmitted and analyzed by Detroit Connect.  The portal gives you access to insights delivered by  Detroit Connect Virtual Technician℠. The Detroit Connect portal will also give you access to new features, such as Remote Updates, and Analytics, available late 2017.

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All DDCSN content has been migrated to our DTNAConnect web portal. All information previously on the DDCSN is now on DTNAConnect. We have created a quick reference guide to help you locate the migrated content on DTNAConnect. Existing DDCSN login credentials will also work with DTNAConnect. Please work with your security administrators for login or content issues. If you do encounter any technical issues, please contact the Software Support Center at 855-639-8680 or


DTNA Connect Portal

DTNA Connect is the starting point for working with all brands and franchises that fall under the Daimler Truck North America umbrella: Detroit, Thomas Built Buses, SelecTrucks, Sterling, Freightliner, and Western Star. Here, you can access the full spectrum of online applications, resources and tools you need. Whether you use DTNA online resources to complete repairs, purchase parts, submit warranty claims, spec new vehicles or track the status of your truck orders, DTNAConnect streamlines the tasks and activities that are part of your daily work routine.

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