Understanding the MaxxForce™ Engine Lineup
M Marianaela Munoz

Understanding the MaxxForce™ Engine Lineup

Sep 30, 2025

🛠 Understanding the MaxxForce™ Engine Lineup

When International Truck and Engine (Navistar) launched the MaxxForce™ Diesel Power family, they designed each model for a specific job. Here’s a simple breakdown so you know which engine fits where.

🔹 MaxxForce™ 5 – Compact V6

  • Trucks: Class 4–5 (CityStar™)

  • Power: 200 HP / 440 lb-ft

  • Best For: Lighter-duty delivery & city work

🔹 MaxxForce™ 7 – Quiet V8

  • Trucks: Class 5–7 (DuraStar™, IC buses, XT)

  • Power: 200–230 HP / 560–620 lb-ft

  • Best For: Medium-duty hauling with better fuel economy & low noise

🔹 MaxxForce™ DT – The Legendary I6

  • Trucks: Class 6–8 (DuraStar™, WorkStar™)

  • Power: 210–300 HP / 520–860 lb-ft

  • Best For: Proven reliability, easy maintenance, lower cost of ownership

🔹 MaxxForce™ 9 – Stronger I6

  • Trucks: Class 7–8 (DuraStar™, WorkStar™)

  • Power: 300–330 HP / 800–950 lb-ft

  • Best For: Heavier loads with more durability & comfort

🔹 MaxxForce™ 10 – Heavy Hauler

  • Trucks: Class 8 (WorkStar™, TranStar™)

  • Power: 310–350 HP / 1,050–1,150 lb-ft

  • Best For: High-torque, tough vocational work

🔹 MaxxForce™ 11 & 13 – Big Bore Power

  • Trucks: Class 8 (TranStar™, ProStar™, WorkStar™)

  • Power: Higher HP / Big torque (varies by rating)

  • Best For: Long-haul, maximum strength, fuel efficiency

✅ Takeaway:

  • Small numbers (5 & 7) = lighter/medium-duty

  • Middle models (DT, 9, 10) = heavier vocational trucks

  • Big bores (11 & 13) = long-haul Class 8 tractors

Link to share

Use this link to share the article with a friend.