2021 International MV: Oil Capacity & Filter

The 2021 International MV takes 26.9 quarts (25.5 liters) of engine oil for both the Cummins B6.7 and L9 engines.

Quick Answer

• Oil Capacity: 26.9 quarts (25.5 liters)
• Recommended Oil Weight:
  • Cummins B6.7: API FA-4 10W-30
  • Cummins L9: API FA-4 10W-30
• Oil Specification: API FA-4
• Oil Filter Part Numbers:
  • Cummins B6.7:
    • OEM: Consult dealer
    • Wix: 57401
    • Fram: CH11985
  • Cummins L9:
    • OEM: Consult dealer
    • Wix: 57404
    • Fram: CH11986

Capacity by Engine Option

Oil Change Interval

The recommended oil change interval for the 2021 International MV will vary depending on your usage and duty cycle. Always refer to your owner's manual or the vehicle's maintenance monitor for precise recommendations.

• Normal Duty: Typically every 20,000 to 30,000 miles or 500 hours, whichever comes first.
• Severe Duty (e.g., frequent towing, dusty conditions, extensive idling): Intervals may be reduced to 10,000 to 15,000 miles or 250 hours. Consider oil analysis for optimized severe duty intervals.

Drain Plug Torque

• Cummins B6.7 & L9: Consult your service manual for the exact drain plug torque specification. It is crucial to use a torque wrench to avoid overtightening or under-tightening, which can lead to leaks or damage.
• Crush Washer: Always replace the crush washer (gasket) on the drain plug with a new one during every oil change. This ensures a proper seal and prevents leaks.

How to Change the Oil

1. Preparation: Park the truck on a level surface, engage the parking brake, and allow the engine to cool for a while, but not completely cold (warm oil drains better).
2. Locate Drain Plug: Place a large drain pan under the engine oil pan. Locate the oil drain plug.
3. Drain Oil: Carefully remove the drain plug and allow all the old oil to drain completely. Be mindful of hot oil.
4. Replace Drain Plug: Once drained, clean the drain plug, install a new crush washer, and reinstall the drain plug, torquing it to the manufacturer's specification.
5. Replace Oil Filter: Locate the oil filter. Unscrew the old filter (a strap wrench may be helpful). Ensure the old filter gasket is removed from the engine block. Apply a thin coat of new oil to the gasket of the new filter. Install the new filter hand-tight, then tighten an additional 3/4 to 1 full turn (refer to filter instructions).
6. Add New Oil: Remove the oil filler cap and carefully add the recommended amount and type of new engine oil. Use a funnel to prevent spills.
7. Check Level: Start the engine and let it run for a few minutes to circulate the new oil. Shut off the engine, wait a few minutes for the oil to settle, then check the oil level with the dipstick. Add more oil if necessary, being careful not to overfill.
8. Inspect for Leaks: Check around the drain plug and oil filter for any signs of leaks.

Common Issues / Tips for this Generation

• DEF System Integration: While not directly oil-related, the 2021 MV with Cummins engines heavily relies on the Diesel Exhaust Fluid (DEF) system. Ensure all DEF system components are in good working order to prevent engine derates or related issues that can indirectly impact overall engine health.
• Regular Oil Analysis: For fleet operators or severe duty applications, consider regular oil analysis. This can provide valuable insights into engine wear, contamination, and help optimize oil change intervals, potentially extending drain intervals safely or identifying potential issues early.
• Fuel Dilution: Diesel engines can be prone to fuel dilution, especially with DPF (Diesel Particulate Filter) regeneration cycles. Using the correct FA-4 oil is crucial, as it's designed to handle these conditions. Oil analysis can also help monitor fuel dilution levels.
• Proper Break-in Procedures: If the truck is new, adherence to the manufacturer's recommended engine break-in procedures is vital for long-term engine health and optimal oil consumption.
• Aftertreatment System Care: The aftertreatment system (DPF, SCR) on these newer diesel engines is sensitive. Using the specified API FA-4 oil helps protect these components and ensure proper function, preventing premature clogging or damage that could lead to costly repairs.

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