Industry-leading reliability, quality and fuel economy are just a few of the superior aspects of the medium-duty PX6 engine from PACCAR. This engine is ideal for Class 6 or weight-limited Class 7 uses, designed to deliver the efficiency and durability needed to maintain lower fuel economy and operating costs while increasing productivity and reducing maintenance. With more than 670 authorized PACCAR dealers across all states and a 24/7 hotline for technical support, access to assistance and service is never far away. Each part in our PX6 engines, from after-treatment to air intake, has been carefully inspected and integrated ensuring reliability, efficient performance and longevity for the engine.