Cat® DEO™ is developed, tested, and approved by Caterpillar to meet the same rigorous standards as all Genuine Cat® Parts. It is formulated to resist oxidation and prevent deposit buildup on pistons and rings, helping to extend engine life. Thoroughly tested in Cat diesel engines, it delivers proven performance across all applications, including those using high-sulfur fuels. With improved soot control and enhanced shear stability, Cat DEO maintains proper viscosity over longer operating periods, ensuring long-lasting protection. It is also used as the standard factory-fill for Cat engines, reinforcing its reliability and quality.

Recommended Use
• Tier 3 and prior engines without aftertreatment systems
• Heavy-duty diesel engines made by other manufacturers that recommend API CI-4 PLUS, CI-4 and prior classification oils
• Automotive gasoline engines that require API SL classification oils

Always follow the fluid recommendations in your OMM. Contact your dealer for additional information.