For heavy or highway hauling in demanding applications, the PACCAR MX-13 engine, with its 12.9-liter capacity, provides the robust power and durability required for moving maximum loads efficiently. Offering up to 510 horsepower and 1,850 lb.-ft. of torque, the engine delivers consistent performance across a broad operating spectrum. Custom-tailored to meet your specific operational needs, the PACCAR MX-13 not only enhances your driving experience but also offers greater low-end power and improved fuel efficiency.

Engineered for Uptime

Built for demanding duty cycles, the PACCAR MX-13 is proven through multi‑million‑mile endurance testing. Every MX‑13 also comes standard with remote diagnostics, helping deliver faster, more focused uptime support when it matters most.

Designed for Fuel Efficiency

Fuel savings is a key reason the PACCAR MX‑13 continues to gain popularity in the heavy‑duty market—delivering the efficiency fleets want without sacrificing capability.

Lower Maintenance Costs Over the Long Haul

With oil and filter service intervals of up to 75,000 miles (application-dependent), the MX‑13 helps reduce routine maintenance costs over the life of the engine—saving time in the shop and money on upkeep.

More Payload Potential with Less Weight

Less engine weight means more capacity for the work that pays. The PACCAR MX‑13 can provide up to a 450 lb. weight savings compared to 15‑liter engines, helping maximize payload on every trip.

Strong, Smooth Power—Quiet Where It Counts

The MX‑13 delivers a broad torque curve with peak torque available at low RPM, which helps reduce shifting and supports a more relaxed driving experience. Quiet operation further improves comfort behind the wheel.