2022 International MV Fluid Specifications & Capacities

As an ASE-certified master technician who has spent countless hours under the hood of medium-duty commercial trucks, I know that keeping a 2022 International MV on the road requires strict adherence to factory fluid specifications. Whether your MV is equipped with the legendary Cummins B6.7 or the heavy-hauling L9 engine, running the wrong fluid isn’t just a minor mistake—it’s a fast track to catastrophic failure, severe downtime, and voided warranties.

In the commercial world, "close enough" doesn't cut it. Modern emissions systems, high-pressure common-rail injection, and advanced Allison transmissions demand hyper-specific chemical formulations to handle extreme heat and sheer stress. Below is the complete, factory-spec fluid guide for the 2022 International MV series to ensure your rig stays out of the bay and on the payload route.

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil (B6.7 / L9)	15W-40 or 10W-30 API CK-4 / Cummins CES 20086	B6.7: ~15-17 qts <br> L9: ~24-26 qts
Engine Coolant	OAT Extended Life Coolant (ELC) / Cummins CES 14603 / Navistar B-1	Varies by chassis (approx. 5-8 gallons)
Transmission Fluid	Allison TES 668 (Backward compatible with TES 295)	14-29 qts (Varies by Allison series/pan depth)
Transfer Case (4WD only)	Synthetic SAE 50W or 75W-90 GL-5 (Varies by Meritor/Fabco unit)	Varies by unit
Front Differential (4WD)	SAE 75W-90 Synthetic GL-5 (Meritor O-76-N / Dana SHAES 256)	Verify in owner's manual / OEM service info
Rear Differential	SAE 75W-90 Synthetic GL-5 (Meritor O-76-N / Dana SHAES 256)	14-40 pints (Varies by axle spec/capacity)
Brake Fluid (Hydraulic)	DOT 4 J1704 (Note: Most MVs are Air Brake equipped)	~2-3 quarts
Power Steering Fluid	Dexron III / Allison C-4 or Navistar Spec Power Steering Fluid	~3-4 quarts
Diesel Exhaust Fluid (DEF)	ISO 22241 standard	Varies by tank size (typically 5-15 gallons)
Washer Fluid	Standard All-Season Washer Fluid	~1 gallon

Note: Capacities can vary wildly depending on wheelbase, specific axle configurations, PTO fitment, and cooling packages. Always verify in the owner's manual / OEM service info before filling.

Engine Oil

The lifeblood of the 2022 International MV's Cummins engines (whether the B6.7 or L9) is high-quality diesel engine oil. For the 2022 model year, the gold standard is API CK-4, which specifically replaces the older CJ-4 standard to provide better oxidation resistance, aeration control, and shear stability.

Always look for the Cummins CES 20086 approval on the bottle. In moderate to warm climates, conventional or synthetic-blend 15W-40 is standard. If you are operating in colder northern climates, switching to a full-synthetic 10W-30 or 5W-40 API CK-4 oil will drastically improve cold-start lubrication and reduce wear on the turbocharger bearings. Pitfall: Never use outdated API specs (like CI-4) as they contain higher levels of sulfated ash, phosphorus, and sulfur (SAPS). High SAPS oils will rapidly poison and clog the Diesel Particulate Filter (DPF), leading to forced regenerations and a very expensive replacement.

Engine Coolant

The 2022 International MV cooling system is massive, designed to reject extreme heat from both the engine block and the EGR cooler. It requires an Organic Acid Technology (OAT) Extended Life Coolant (ELC) that meets Cummins CES 14603 or Navistar B-1 Type III specifications (typically red or yellow).

OAT coolants are formulated without silicates and phosphates, relying instead on organic acids to protect wet sleeve liners (in the L9) against cavitation. Pitfall: Never mix OAT coolant with older HOAT (Hybrid Organic Acid Technology) or conventional green silicated coolants. Mixing these can cause the corrosion inhibitors to drop out of suspension, forming an abrasive gel that destroys water pump seals and clogs the heater core and EGR cooler. Always top off with a 50/50 premix of the exact same specification.

Transmission Fluid

Virtually all 2022 International MVs are outfitted with an Allison automatic transmission (1000, 2000, or 3000 series). Allison has upgraded their fluid specification to TES 668, which supersedes the legendary TES 295 spec. TES 668 is fully backward compatible but offers vastly improved anti-shudder durability and clutch friction consistency.

Pitfall: Never use universal ATF, Dexron VI, or Mercon LV in a modern Allison commercial transmission unless strictly directed in an emergency. Universal fluids lack the sheer stability required for a medium-duty truck carrying a 25,000+ lb GVWR. Sticking to an approved TES 668 fluid (like Allison TranSynd 668) extends service intervals dramatically—often up to 150,000 miles under general duty cycles.

Transfer Case and Differentials

Drive axles in the International MV are typically sourced from Dana Spicer or Meritor. The standard factory fill for both the front (if 4x4) and rear differentials is a fully synthetic gear oil, usually SAE 75W-90 meeting API GL-5. Look for manufacturer approvals like Dana SHAES 256 Rev C or Meritor O-76-N.

These synthetic gear lubes are designed for 500,000-mile drain intervals in line-haul applications, though vocational trucks (dump, towing, refuse) should be serviced much sooner. If your MV is equipped with a limited-slip differential, check the specific axle tag—some require a supplemental friction modifier to prevent clutch pack chatter, though many modern synthetic gear oils already include it. For 4x4 models with a Fabco or Meritor transfer case, fluid requirements can range from SAE 50W synthetic manual transmission fluid to 75W-90 GL-5. Always verify the specific tag on the transfer case housing.

Brake System

Most International MVs in the medium-duty sector are ordered with air brakes, which require no hydraulic brake fluid—relying instead on the Bendix air compressor and desiccant air dryer system (maintain that air dryer cartridge!).

However, lighter GVWR configurations (under 26,000 lbs) may be equipped with hydraulic brakes. If so, they require a high-quality DOT 4 (J1704) brake fluid. DOT 4 handles the extreme heat generated by stopping a heavy chassis much better than DOT 3. Pitfall: Brake fluid is hygroscopic. It absorbs moisture from the air, which lowers its boiling point and corrodes the ABS modulators from the inside out. Flush hydraulic brake systems every two years, regardless of mileage. Never use DOT 5 (silicone-based) fluid in an ABS-equipped truck, as it will aerate and cause a spongy pedal.

Power Steering

The MV’s heavy-duty steering gear requires a fluid that can handle immense hydraulic pressure without foaming. The standard spec is typically an Allison C-4 rated fluid or Dexron III equivalent, though Navistar also offers a specific Heavy Duty Power Steering Fluid. Regularly check the fluid level and inspect for dark coloring or burnt smells, which indicate pump overheating.

DEF (Diesel Exhaust Fluid) and Washer Fluid

To keep the SCR (Selective Catalytic Reduction) system happy, you must use Diesel Exhaust Fluid that strictly meets the ISO 22241 standard (API certified). DEF is 32.5% high-purity urea and 67.5% deionized water. Pitfall: Never put anything but pure DEF in the DEF tank. Even a tiny drop of diesel fuel, coolant, or tap water will permanently destroy the DEF dosing valve and the SCR catalyst, leading to an immediate derate and a repair bill in the thousands.

For the windshield washer, any standard all-season commercial washer fluid is fine. In winter, ensure the fluid is rated well below your lowest expected temperature to prevent cracking the reservoir or lines.

Maintenance on a 2022 International MV isn’t something to gamble with. By strictly adhering to these OEM fluid specifications, you maximize uptime and protect your commercial investment.

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