Mack Trucks Unveils EPA 2027-Compliant MP13 Engine with Improved Power and Efficiency
Mack Trucks announced its new MP13 diesel engine will meet EPA 2027 emissions standards, delivering up to 540 hp and 3% better fuel efficiency.
- 540 hp
- 1,950 lb.-ft.
- up to 3%
What Happened
Mack Trucks today announced at ACT Expo 2026 that its new MP13 engine will be EPA 2027-compliant. The MP13 delivers up to 540 horsepower and 1,950 lb.-ft. of torque, with up to 3% improved fuel efficiency over previous versions. It also features stronger stopping power with up to 630 braking horsepower—a more than 20% improvement.
The engine meets EPA 2027 standards through enhancements that deliver more complete combustion and lower engine-out CO2, soot, and particulate matter. It is compatible with renewable diesel (R100) and biodiesel blends up to B20, up from B10 on the previous MP13, giving fleets flexibility to use lower-carbon fuels.
“The MP13 represents years of engineering work to deliver an engine that meets the toughest emissions standards in our industry's history, but does so without asking our customers to compromise on power or efficiency.”
The EPA 2027 MP13 will be available across Mack's highway and vocational lineup, including the Mack Pioneer, Anthem, Granite, and Keystone models. Ordering begins in August 2026, with production aligned to model year 2028 vehicles.
Why this matters
The MP13 helps fleets comply with upcoming stricter emissions rules without sacrificing performance, while supporting renewable diesel and biodiesel for lower-carbon operations.
Terms in This Story
- EPA 2027
- U.S. Environmental Protection Agency emissions standards that take effect in 2027.
- Renewable diesel (R100)
- A fuel made from renewable sources, chemically similar to petroleum diesel.
- Biodiesel B20
- A blend of 20% biodiesel and 80% petroleum diesel.
- Downspeeding
- Operating an engine at lower RPM for better fuel efficiency.
Summarised from the linked release; details can be imperfect — always verify against the original source.