Full Synthetic Engine Oil 5W-40, 4 Pack

Reliant FS engine oils have been specifically formulated to meet today's heavy-duty diesel OEM (Original Equipment Manufacturer) requirements and stringent API Commercial Category CK-4 specifications. Blended with state-of-the-art, technologically advanced additives and superior quality synthetic base oils, these engine oils surpass the higher performance demands of model year 2017 and newer heavy-duty diesel engine hardware. The API Commercial Category CK-4 offers backwards compatibility for older diesel engines requiring older, obsolete Commercial classifications including CJ-4, CI-4 Plus, CI-4 and CH-4.

D-A Reliant FS engine oils promote robust engine cleanliness and protect against deposit formation. They also guard against viscosity increase by affording superior thermal / oxidation stability under extreme temperature 'severe service' (duty) operation, effectively minimizing harmful oxidative conditions. Reliant Full Synthetic engine oils maintain film strength and shear stability throughout intended service, equating to longer, more pronounced service drain intervals. Moreover, they provide outstanding pumpability / flowability in extreme cold ambient environments.

Additionally, these engine oils afford significant alkalinity or higher Total Base Number to maximize acid neutralization and prevent harmful component corrosion. The size of the product is 1 Gallon (4 Pack).

In summary, Reliant FS engine oils are specifically designed to meet the demanding requirements of modern heavy-duty diesel engines. Their advanced formulation, including state-of-the-art additives and superior synthetic base oils, ensures exceptional performance, cleanliness, and protection against various operating conditions. These engine oils are backward compatible, making them suitable for both newer and older diesel engines. The combination of their robust qualities and the convenient 1 Gallon (4 Pack) size makes Reliant FS engine oils an attractive choice for maintaining the optimal performance and longevity of heavy-duty diesel engines.

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