Moving up in the PACCAR line takes us to the MX-11, which is used in Peterbilt model 567 and 579 trucks. This 10.8-liter engine can put out as much as 430 horsepower and 1,650 pound-feet of torque.

There are two engine brands that power Peterbilt trucks: PACCAR and Cummins. The PACCAR engines include MX-13, MX-11, PX-9, and PX-7, while the Cummins models are limited to X15, ISX12N, L9N, and ...

I recently had the chance to drive a Peterbilt 579 with EPIQ package and the MX-11 engine in and around Denton, Texas, where Peterbilt builds these trucks. The engine itself is built in Paccar’s ...

Peterbilt Motors Co. announced that a California-compliant version of the Paccar MX-13 diesel engine is now available in its Model 579, Model 567 and Model 589 trucks.

Driving the Peterbilt Model 567DENTON, Texas — Designing a vocational truck can’t be easy. Of course these customers want a truck that’s tough and durable and one that can be easily fixed when ...

Peterbilt is retiring its Model 389, a truck that has carried the torch for the glory days of trucking for 17 years. The Model 389 r eplaced 379 in 2006 with redesigned headlamps fenders and trim ...