The gold standard in engine oil  

Mobil Delvac™ diesel engine oils can help you reach your business goals. These CK-4 and FA-4 oils outperform CJ-4 oils; they are designed to help increase oil drain intervals (ODIs) and boost uptime. Learn more about Mobil Delvac heavy-duty diesel engine oils below. If you can’t find what you need here, please reach out to authorized distributors for more Proposed Category 11 (PC-11) information.

We compared our CK-4 Mobil Delvac™ 1300 Super engine oils to our CJ-4 Mobil Delvac 1300 Super engine oils. The test results showed that the CK-4 oils provided 20 percent improved wear protection,* 50 percent improved oxidation resistance† and 80 percent improved high-temperature viscosity control.† In addition, the PC-11 oils showed enhanced fuel economy potential (for FA-4 products only) and protection beyond original equipment manufacturer (OEM) ODIs.

Comparison chart of CK 4 and FA 4 Mobil Delvac™ and Mobil Delvac 1™ engine oils

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Mobil Delvac heavy-duty diesel engine oils

  • Mobil Delvac 1™ advanced full synthetic heavy-duty diesel engine oils

    Mobil Delvac 1™

    Mobil Delvac 1 is an advanced full synthetic diesel engine oil that provides extended drain capability and exceptional low-temperature performance with the potential to improve fuel economy. It meets or exceeds the requirements of OEMs, and its state-of-the-art technology provides:

    • Outstanding performance at extreme temperatures
    • Our best cold-weather protection
    • Our best protection for drivers with extended drain intervals
    • Enhanced emissions systems protection in a variety of severe conditions

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  • Mobil Delvac ™ premium synthetic blend heavy-duty diesel engine oils

    Mobil Delvac™ Extreme

    Mobil Delvac Extreme is a premium synthetic blend, high-performance diesel engine oil that helps extend engine life while providing long drain capability for modern diesel engines operating in extreme conditions. Its boosted formulation provides:

    • Exceptional oxidation stability§
    • Performance up to 2X OEM-recommended ODIs**
    • 46 percent more antioxidant and 44 percent more anti-wear additive than Mobil Delvac™ 1300 Super
    • Excellent soot and viscosity control

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  • Mobil Delvac™ premium conventional diesel engine oils

    Mobil Delvac™ 1300 Super

    Mobil Delvac 1300 Super is an advanced diesel engine oil that meets or exceeds OEM requirements and delivers high performance in both on- and off-highway applications. Its carefully tailored formulation provides:

    • Performance for up to 50 percent beyond OEM-recommended ODIs**
    • 50 percent more wear protection than required in API engine tests
    • Outstanding oxidation stability
    • Excellent soot and viscosity control

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*Based on a comparison of Cummins ISM and Mack T-12 engine test results
†Based on a comparison of Volvo T-13 engine test results.
‡Compared to a 15W-40 conventional engine oil. Actual savings are dependent upon vehicle/engine type, outside temperature, driving conditions and your current engine oil viscosity.
§Based on performance in the Volvo T-13 engine test.
**Results may vary based on vehicle/engine condition, driving and environmental conditions. Consult OEM or ExxonMobil before implementing extended ODIs.

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