2021 International MV Fluid Type Specs

Quick Reference

Engine Oil

For your 2021 International MV, the engine oil specification is critical for the longevity and performance of its diesel engine. International generally recommends heavy-duty diesel engine oils meeting API CK-4 or API FA-4 standards. The choice between CK-4 and FA-4 depends on the specific engine model and original factory fill. Always verify the precise recommendation in your owner's manual or the engine manufacturer's guidelines. FA-4 oils are typically lower viscosity and designed for improved fuel economy in newer engines, while CK-4 offers robust protection for a wider range of heavy-duty diesel applications.

The typical viscosity grade for these engines is SAE 15W-40, especially in warmer climates or for engines not specifically designed for lower viscosity FA-4 oils. For colder climates, or where FA-4 is specified, a 10W-30 or 5W-30 viscosity might be recommended.

Capacity can vary significantly based on the engine model (e.g., Cummins, International A26/B6.7). Expect a range of 28 to 36 quarts (7-9 gallons). It is crucial to use the dipstick for accurate measurement after an oil change.

Intervals: Standard oil change intervals for heavy-duty diesel engines can range from 15,000 to 30,000 miles or 300-500 hours, depending on operating conditions, oil analysis results, and the specific engine model. Severe service conditions (e.g., frequent idling, heavy loads, dusty environments) will necessitate shorter intervals.

Pitfalls: Never mix FA-4 with CK-4 oils unless specifically approved by the engine manufacturer, as this can dilute the properties of the FA-4 oil and potentially impact fuel economy. Always use oils approved for diesel particulate filter (DPF) and selective catalytic reduction (SCR) systems to prevent damage to emissions components.

Engine Coolant

Your 2021 International MV will typically use an Organic Acid Technology (OAT) or Hybrid Organic Acid Technology (HOAT) coolant. The factory fill is most commonly an OAT formulation, often red or pink in color. Look for coolants meeting ASTM D6210 for fully formulated glycols for heavy-duty engines, or ASTM D7892 for OAT coolants. International may have its own proprietary specification; always refer to the owner's manual for the exact OEM specification number.

Capacity ranges from 30 to 40 quarts (7.5-10 gallons) for the entire cooling system. This can vary with radiator size and ancillary cooling systems.

Intervals: OAT coolants offer extended service intervals, typically 5 years or 150,000 to 250,000 miles, but this should be verified with the manufacturer's guidelines. Regular testing of the coolant