10 Best Diesel Engine Oils 2024 in the US

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Designed for Modern Diesel Engines: Optimized for the latest diesel truck engines, enhancing performance and longevity.

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Long Drain Capability: Extended oil change intervals, reducing maintenance time and costs.

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Potential Fuel Economy Benefits: Formulated to improve fuel efficiency, potentially lowering operational costs.

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Meets Major Manufacturers' Specifications: Complies with the requirements of leading truck manufacturers for mixed fleet operations.

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Recommended for High-Performance Diesel Applications: Suitable for a wide range of diesel engines, including those with low emissions.

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Triple Protection Plus technology: Protects against wear, deposits, and oil breakdown.

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Enhanced fuel economy: Improves fuel economy by 1.5% without compromising protection.

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Advanced low-ash formulation: Helps control blocking of exhaust after-treatment devices.

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Improved low-temperature flow: Provides better flow compared to conventional 15W-40 oils.

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Extensive industry and OEM specifications: Meets or exceeds multiple industry and OEM standards.

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Cummins Endorsement: Exclusively endorsed and recommended by Cummins for their engines.

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Shear Stability: Maintains viscosity and performance under high shear conditions.

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Wear Protection: Provides enhanced protection against engine component wear.

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Deposit Protection: Offers superior cleaning capabilities to prevent deposits exceeding industry standards.

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Enhanced Deposit Protection: Formulated to help keep engines cleaner over the oil drain interval, ensuring better engine cleanliness.

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Low Ash Formulation: Protects exhaust catalysts and particulate filters on low emission vehicles, aiding in the reduction of maintenance costs.

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API CJ-4 Compliance: Meets or exceeds stringent API CJ-4 requirements, suitable for modern and older engines, providing versatile performance.

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Shear Stability: Enhanced shear stability ensures consistent viscosity control and optimal oil pressure in various engine conditions.

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Broad Engine Protection: Offers outstanding protection for nearly all heavy duty diesel engines, including those with EGR and diesel particulate filters.

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Triple Protection Plus technology: Protects against wear, deposits, and oil breakdown.

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Ideal for high-power vehicles: Suitable for fleets, construction, and agricultural machinery.

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Advanced low-ash formulation: Helps maintain emission compliance and fuel efficiency.

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37% better engine wear control: Exceeds API CK-4 engine wear test requirements.

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Extended warranty: Valid up to 10 years or 300,000 miles with exclusive use.