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

Advanced technology for heavy-duty performance  

Mobil Delvac 1™ advanced full synthetic, heavy-duty diesel engine oils help extend engine life while providing long oil drain intervals, extreme high- and low-temperature performance and fuel economy potential.* These oils are backed by our exclusive limited warranty, providing protection for you and your fleet.

*Relative to conventional higher viscosity engine oil. Actual fuel economy improvement is dependent on vehicle/equipment type, outside temperature, driving conditions and your current fluid viscosity.



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  • Mobil Delvac 1™ LE

    Uses state-of-the-art technology to deliver exceptional performance, enhanced protection and fuel economy potential in challenging conditions.

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  • Mobil Delvac 1™ ESP

    Features a boosted formulation that meets or exceeds the API CK-4 specification and provides excellent engine protection – even in extreme conditions.

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  • Find a distributor near you

    Use our locator tool to find out where to buy Mobil Delvac™ products in your area.

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  • Bumper-to-bumper product guide

    It’s easy to find the right Mobil Delvac™ product for any fleet application. Explore our bumper-to-bumper product guide now.

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