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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Full Synthetic Formula: Triple Protection Plus technology for superior wear, deposit control, and oil breakdown resistance, enhancing low-temperature flow.

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Exceptional Wear Protection: Offers extended engine life across various heavy-duty applications, from personal trucks to agricultural and commercial vehicles.

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Enhanced Fuel Economy: Improves fuel efficiency by 1.5 percent without sacrificing protection or durability, compared to traditional 15W-40 oils.

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Advanced Additives: Multi-functional dispersant additives combat soot, dirt, and contaminants, providing superior engine cleanliness.

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Increased Shear Stability: Maintains viscosity under severe conditions for consistent engine oil pressure and reduced engine wear.

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

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Extended drain capability: Provides more uptime

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Improved wear performance: Better than API CJ-4 technology

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Compatibility with emissions systems: Works with exhaust emissions control systems

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Limited warranty: Valid up to 15 years or 500,000 miles with exclusive use

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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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Premium Quality: Heavy duty motor oil manufactured in the USA

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Low Emission Engines: Meets requirements of post-2007 low emission engines

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Versatile Performance: Works with ultra-low, normal, and low sulfur diesel fuels

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Compatibility: Can be used in older conventional and gasoline engines

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ISOSYN Technology: Formulated with advanced ISOSYN technology

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Full Synthetic 5W-30: Provides enhanced wear protection, deposit control, and oil breakdown resistance, improving high/low temperature performance.

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Triple Protection Plus: Technology that safeguards engines against wear, deposits, and oil breakdown.

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Multi-Vehicle Compatibility: Suitable for both diesel and gasoline engines, allowing for lubricant consolidation in mixed fleets.

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Enhanced Fuel Economy: Offers a 2.8 percent improvement in fuel economy, providing savings without compromising protection or durability.

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Increased Shear Stability: Ensures better viscosity control and maintains optimal engine oil pressure.

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Superior Protection: Unique blend of synthetic oils provides advanced protection for engine components.

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Enhanced Additive Technology: Reduces engine wear and prevents metal-to-metal contact for longer engine life.

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Tenacious Oil Film: Oil adheres to engine surfaces and remains after shutdown, ensuring protection during initial startup.

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Patented ZDDP Additives: Optimizes the life of catalytic emission systems with specially formulated additives.

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High-Performance: Engineered to outperform conventional oils in various driving conditions.

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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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Quantity: Comes in a convenient 4-gallon pack, ensuring ample supply for multiple oil changes or large capacity needs.

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Viscosity Grade: 15W-40 viscosity rating, suitable for a wide range of diesel engines and operating environments.

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Engine Compatibility: Formulated for diesel engines that require 15W-40 engine oil, as per the specifications on the bottle.

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Additive System: Features a unique additive system designed to extend engine life by protecting against wear and tear.

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Wear Protection: Excellent protection in heavy-duty applications.

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Oxidation Resistance: Resists oxidation and fights deposits & sludge.

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Sheer Stability: Maintains performance by resisting viscosity changes.

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One Solution GEN2: Protects diesel, gasoline, and natural gas engines.

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Extended Oil Drains: 5,000 miles extension in Cummins X15/X12 engines.