2020 International MV Oil Capacity & Filter Guide

The 2020 International MV takes between 15 and 26 quarts of oil, depending on whether it is equipped with the Cummins B6.7 or the larger Cummins L9 engine. As an ASE-certified master technician, I regularly service medium-duty trucks, and knowing the exact specifications for your specific configuration is crucial for keeping these workhorses on the road and out of the shop.

Below is the complete reference guide for servicing the engine oil on your 2020 International MV.

Quick answer

Here are the standard specifications for the most common 2020 International MV configuration featuring the Cummins B6.7 engine:

• Oil Capacity: 15.0 - 17.5 quarts (14.2 - 16.5 L) with filter, depending on the specific oil pan installed. Always check the dipstick after adding the initial 15 quarts.
• Recommended Weight: 15W-40 (for standard climates) or 5W-40 full synthetic (for climates experiencing temperatures below 5°F).
• Oil Specification: API CK-4 / Cummins CES 20086.
• OEM Oil Filter: Fleetguard LF3970 (for Cummins B6.7).
• Aftermarket Cross-References: Wix 57620, Baldwin BT7349, Fram PH3976A.

Note: If your MV is equipped with the Cummins L9, the OEM filter is generally the Fleetguard LF9009.

Capacity by engine option

Because the International MV series is highly customizable for different vocational applications, oil capacity depends heavily on the engine and the specific oil pan chosen during the chassis build.

Oil change interval

Keeping up with maintenance intervals is the lifeblood of a medium-duty truck engine. Cummins engines are robust but highly sensitive to soot loading and oil degradation.

• Normal Duty: Replace oil and filter every 15,000 miles, 500 engine hours, or 6 months—whichever comes first. This applies to standard pickup and delivery or highway use.
• Severe Duty: Replace oil and filter every 10,000 miles, 250 engine hours, or 6 months. This applies to refuse trucks, dump trucks, high-idle applications, or heavy towing in dusty environments.

Drain plug torque

• Torque Spec: 37 ft-lbs (50 Nm) for standard stamped steel Cummins oil pans. (If equipped with an aftermarket or composite pan, consult the dealer for specific torque specs).
• Crush Washer Note: Always inspect and replace the copper or nylon sealing washer on the drain plug. Reusing a deformed washer is a guaranteed way to cause a slow drip.

How to change the oil

1. Prepare the truck: Park on level ground, set the parking brake, and chock the wheels. Run the engine briefly to warm the oil, which helps suspend particulates for better drainage.
2. Drain the oil: Place a large-capacity catch pan (minimum 5-gallon / 20-liter capacity for the B6.7, larger for the L9) under the drain plug. Remove the plug and let it drain completely.
3. Replace the filter: Using a heavy-duty filter wrench, remove the old oil filter. It will be heavy and full of oil. Wipe the filter housing base clean.
4. Prep the new filter: Pre-fill the new oil filter with fresh oil to prevent a dry start. Apply a light film of clean oil to the new filter's rubber gasket. Thread it on by hand until it makes contact, then tighten an additional 3/4 to 1 full turn (or according to the filter housing instructions).
5. Reinstall drain plug: Install the drain plug with a new crush washer and torque to 37 ft-lbs.
6. Refill and verify: Add the base amount of recommended oil (e.g., 15 quarts for the B6.7). Start the engine, let it run for a minute to build oil pressure, and shut it off. Let it sit for 5 minutes, check the dipstick, and top off to the "FULL" mark.

Common issues / tips

• Soot Loading: The B6.7 and L9 engines utilize EGR (Exhaust Gas Recirculation), which dumps soot back into the engine. This makes the oil turn pitch black almost immediately after an oil change. This is completely normal, but it underscores the importance of using high-quality CK-4 oil to handle the soot dispersion.
• Pre-filling Filters: Never install a dry oil filter on a commercial diesel engine. The oil capacity of the filter alone is over a quart, and a dry start will starve the turbocharger and bearings of vital lubrication.
• Oil Pan Corrosion: For MV models operating in the Rust Belt, inspect the stamped steel oil pan for corrosion during every service. They are prone to rusting through over time.

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