* Engine Variation: The International 464 engine was produced over many years, and various versions exist. The specific oil viscosity depends on the engine's year of manufacture, operating conditions, and modifications.
* Operating Environment: Factors like temperature, load, and altitude all play a role in determining the optimal viscosity.
* Oil Specifications: Consult the engine's owner's manual or the International Truck website for the most up-to-date oil specifications and recommended viscosity.
Where to Find the Correct Information:
1. Your Owner's Manual: This is the primary source for information specific to your engine.
2. International Truck Website: Visit the International Truck website, locate their support section, and look for information on your specific engine model.
3. A Certified Mechanic: Consulting a mechanic experienced with International trucks can provide the most accurate and relevant advice for your vehicle.
General Considerations:
* Modern Engines: Newer International 464 engines might require synthetic oils with specific viscosity ratings.
* Climate: Higher viscosity oils are generally better for colder temperatures, while lower viscosity oils work better in warmer climates.
Always follow the manufacturer's recommended oil viscosity and specifications to ensure optimal engine performance and longevity.
