🚛 PACCAR MX-13 vs. PACCAR MX-11: Which Engine Fits Your Fleet?

PACCAR’s MX engine platform is designed for power, efficiency, and long life. Both the MX-13 and MX-11 deliver advanced technology, durability, and fuel savings — but each engine is tailored to different needs. Here’s a clear comparison to help you understand the strengths of each.

🔹 PACCAR MX-13: Heavy-Duty Power

The MX-13 is built for demanding applications and maximum payloads.

Key Highlights:

• Displacement: 12.9 liters

• Horsepower Range: 405–510 HP

• Torque: 1,450–1,850 lb.-ft.

• Weight: 2,600 lbs.

• Oil Capacity: 42 quarts

• Clutch Engagement Torque: 937 lb.-ft. @ 800 RPM

• Best For: Heavy hauling, highway applications, maximum loads

Benefits:

• Strong pulling power across a wide RPM range

• More flexibility and low-end power

• Optimized fuel efficiency

• Enhanced driving experience for long haul

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🔹 PACCAR MX-11: Lightweight Efficiency

The MX-11 is designed for fleets that prioritize payload, responsiveness, and operating efficiency.

Key Highlights:

• Displacement: 10.8 liters

• Horsepower Range: 355–430 HP

• Torque: 1,250–1,650 lb.-ft.

• Weight: 2,200 lbs. (≈400 lbs. lighter than MX-13)

• Oil Capacity: 39 quarts

• Clutch Engagement Torque: 737 lb.-ft. @ 800 RPM

• Best For: Regional haul, bulk/tanker, construction, refuse applications

Benefits:

• Reduced weight = more payload per trip

• Improved fuel economy and operating efficiency

• Strong low-RPM torque for better drivability

• Quieter operation and smoother ride

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🔹 Shared Strengths

Both engines are engineered for longevity and uptime:

• B10 design life: 1 million miles (90% of engines reach this without overhaul)

• Warranty: 2 years / 250,000 miles standard, with extended options

• Durability: Compacted Graphite Iron blocks, advanced materials, and force-fracture technology for rods and bearings

• Serviceability: Extended service intervals — oil and filter changes up to 75,000 miles — cutting maintenance costs by as much as 30% over the vehicle’s life

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✅ Takeaway

• Choose the MX-13 if your operation demands maximum horsepower, torque, and heavy-haul performance.

• Choose the MX-11 if you need a lighter engine for regional work, better payload, and fuel efficiency.

Either way, PACCAR delivers reliability, uptime, and a lower cost of ownership across your fleet.