Related: Thomas Built Buses Delivers First School Bus With DD5 Engine
Thomas Built Delivers Nearly 1,200 DD5-Equipped School Buses
The school bus manufacturer's Saf-T-Liner C2, which is equipped with the Detroit DD5 engine, is designed to provide a lower total cost of ownership and reduce consumption of both diesel fuel and diesel exhaust fluid.

Thomas Built Buses' Saf-T-Liner C2, which is equipped with the Detroit DD5 engine, is designed to provide a lower total cost of ownership and reduce overall consumption of both diesel fuel and diesel exhaust fluid. Photo courtesy Daimler Trucks North America

Thomas Built Buses' Saf-T-Liner C2, which is equipped with the Detroit DD5 engine, is designed to provide a lower total cost of ownership and reduce overall consumption of both diesel fuel and diesel exhaust fluid. Photo courtesy Daimler Trucks North America
HIGH POINT, N.C. — Thomas Built Buses has delivered nearly 1,200 of its Saf-T-Liner C2 school buses equipped with the Detroit DD5 engine.
The Detroit DD5 engine is a 5.1L engine adapted specifically for the Thomas Built Buses Saf-T-Liner C2. The engine is designed to provide a lower total cost of ownership and reduce consumption of both diesel fuel and diesel exhaust fluid, according to a news release from Daimler Trucks North America, the parent company of Thomas Built Buses.
“We have received extraordinary feedback on the DD5-equipped Saf-T-Liner C2s,” said Caley Edgerly, president and CEO of Thomas Built Buses. “Transportation directors are impressed at the power and efficiency of the four-cylinder engine. And in the coming months, districts will soon realize the decreased maintenance and overall cost savings. This back-to-school season is one that we’ve been looking forward to for a long time.”

The Detroit DD5 engine features Detroit Connect, a subscription-based remote diagnostic service that transmits data to the engine supplier's customer support center. Photo courtesy Daimler Trucks North America
Additionally, Daimler reports that the engine’s aftertreatment system does not have as much to process, resulting in fewer regen cycles and longer service intervals for the Saf-T-Liner C2.
The DD5 engine also comes equipped with the Detroit Connect Virtual Technician, a subscription-based remote diagnostic service that is free for the first five years. Detroit Connect transmits data to the engine supplier's customer support center to enable them to perform informed service decisions. Performance data is also tracked to provide insights into overall vehicle health, fuel economy, and safety performance.
For more information about the Saf-T-Liner C2 equipped with the new Detroit DD5 engine, customers can contact their local dealer.
More Management

5 Questions: How CharterUP Brought a Marketplace to Student Transportation
What does it take to bring a transportation marketplace into K-12? Hear firsthand what CharterUP has learned about the unique needs of schools and bus operators.
Read More →
EverDriven Expands TripCentral Transportation Management Platform to All Partner Districts
The platform provides school districts with real-time trip tracking, student transportation scheduling tools, and pickup and drop-off management capabilities.
Read More →
6 School Transportation Trends to Watch: 2026 District Survey Results
School bus buying is up, fuel choices are shifting, and driver shortages persist. This and more in the latest K-12 public school survey, plus the largest fleets in the U.S.
Read More →
The 100 Largest School Bus Fleets in America: 2026 Rankings
Which public K-12 school districts are the largest in the nation in terms of bus fleet size? Here are the new standings of the top 100 district fleets.
Read More →
EverDriven Launches Route Consolidation Calculator to Estimate Diesel Savings
As diesel prices hit record highs, the largest alternative transportation provider says a 10% route consolidation could save a 120-route district more than $78,000 a year in fuel alone.
Read More →
Zum Secures Continued Financing Support for School Bus Expansion
Generate Private Credit has financed approximately $75 million in school bus deployments across three states, supporting more than 500 buses as Zum expands across the county.
Read More →
Beyond Discipline: A Different Approach to Student Behavior on the Bus
After implementing a dean of students program in Oregon, North Clackamas is seeing positive improvements. Here’s how it worked. The Route is brought to you by IC Bus.
Read More →A Dean of Transportation's Different Approach to Student Behavior on the School Bus
After implementing a dean of students program in Oregon, North Clackamas is seeing positive improvements on the bus. Here’s how it worked.
Read More →
Inside NAPT ACTS 2026: Highlights from Louisville
From federal updates and student behavior strategies to new school bus technology and industry awards, see highlights from NAPT ACTS 2026 in Louisville.
Read More →
Meet the 2026 School Bus Driver Hero Winner: Annette Brown
We caught up with Wa-Nee Community Schools' Annette Brown on site at SBFX, where she was named the 2026 School Bus Driver Hero Award winner. Hear about her reaction, what she loves most about being a school bus driver, and more!
Read More →
