Skip to content
Industrial Oils & Greases

TO-4 Oil

TO-4 oil that meets OEM standards for heavy machinery- ideal for loaders, dozers, and tractors operating under extreme pressure.

What is TO-4 Oil and Why It Matters for Heavy Machinery

TO-4 oil is a specialized transmission and drive train fluid originally specified by Caterpillar to meet the rigorous demands of heavy equipment. Unlike older formulations, it provides improved wear protection, precise friction control, and seal compatibility under extreme pressure. It is used in transmissions, final drives, and hydraulic systems where the equipment manufacturer (OEM) requires TO-4 specification. By maintaining consistent clutch performance and protecting metal components from scoring or pitting, TO-4 transmission fluid helps ensure reliable power transfer in demanding work environments.

Equipment & Conditions That Require TO-4 Oil

Fleet maintenance managers and heavy equipment mechanics depend on TO-4 oils for loaders, bulldozers, graders, backhoes, and agricultural tractors. These fluids are essential in high-load construction projects, off-road mining operations, and continuous agricultural field work. In conditions involving extreme heat, heavy loads, or high-torque cycles, TO-4 oil maintains viscosity stability and protects against oxidation and corrosion. For related lubrication options, you can learn more about specialty conventional engine oils for other heavy-duty applications.

Key Benefits of Using OEM-Spec TO-4 Oils

Using TO-4 oils that meet or exceed Caterpillar TO-4, Allison C-4, and other OEM standards can extend equipment life and minimize downtime. These fluids deliver:

  • Extended component protection against gear wear and metal fatigue
  • Precision friction control for smooth shifting and clutch engagement
  • Resistance to oxidation and corrosion under prolonged, high-temperature use
  • Compatibility with seals and gaskets, preventing leaks and costly repairs

Presidential’s TO-4 collection includes multiple SAE grades – 10W, 30W, and 50W – to suit seasonal or climate-specific needs. For metal component safety in other systems, see our ferrous-safe oils.

Choosing the Right SAE Grade for TO-4 Applications

Selecting the correct viscosity grade is critical for performance:

  • SAE 10W – Best for cold climates and smooth start-up protection
  • SAE 30W – The most common choice for balanced, all-around performance
  • SAE 50W – Ideal for extreme heat or consistently heavy load operations

Always check your equipment’s OEM manual to confirm the appropriate TO-4 grade. For other industrial lubricants and fluids, explore our industrial oil collection for applications requiring higher performance margins.