This Western Peterbilt location services the Mack M8 engine.

The MP8® engine provides the muscle to shoulder heavy workloads. This 13-liter engine has a horsepower range from 415 to 505 HP and torque ratings from 1,460 to 1,860 lb.-ft. 

The MP8 engine, available in Granite®, Pinnacle™ and select TerraPro® models, provides plenty of confidence as it delivers extra brawn for heavy-duty vocational and highway applications.

Easy servicing
The MP Engine Series features 35,000-mile service intervals for highway trucks and 450-hour or 15,000-mile oil drain intervals (whichever comes first) for vocational applications. These engines are designed with convenient access points that make servicing a snap.

Single overhead cam
This MP Engine Series uses a robust single overhead camshaft that reduces stress and incorporates an ultra-high-pressure fuel injection system.

Variable Geometry Turbocharger 
The electronically controlled Variable Geometry Turbocharger incorporates the latest technology to control turbo boost at all RPM ranges and engine loads.

Built like a Mack Truck®
The MP Engine Series is designed with fewer parts, including one-piece steel pistons and stronger bearings and cylinder heads, giving operators a true powerplant that’s built to last.

A brake powerful enough to stop a Mack
The Mack PowerLeash™ engine brake provides more braking horsepower through mid-RPM ranges, and weighs 50 pounds less than competitive engine brakes. It’s fully integrated with the MP Engine Series, and with better braking over the entire speed range, PowerLeash delivers the most braking ever in a Mack engine brake. Drivers will immediately notice how the quiet and responsive PowerLeash engine brake provides more confidence while braking.

For trucks with the Mack mDRIVE™ automated manual transmission, PowerLeash can be programmed to work with the mDRIVE and automatically downshift to maximize engine brake performance.

Maximum performance
Offered in three engine families—Econodyne®, MaxiCruise® and Maxidyne®—the MP Engine Series is tailored to fit your applications. The Econodyne engines are ideal for typical interstate applications where fuel economy is a priority. The MaxiCruise engines perform best on rolling interstates and in on/off road applications. The Maxidyne engines provide high power for low-speed, high-performance and severe-duty conditions, especially in off-road applications.