Skip to main content
Mobil Delvac 1™ ESP 5W-40 diesel engine oil

Mobil Delvac 1™ ESP

Advanced full synthetic, high-performance diesel engine oil

Mobil Delvac 1™ ESP features a new CK-4 formulation. Get more information about PC-11 product changes.

Mobil Delvac 1™ ESP 5W-40 is an advanced full synthetic, high-performance diesel engine oil that delivers long drain capability, exceptional low-temperature performance and helps extend engine life for modern diesel engines operating in severe applications.

Mobil Delvac 1 ESP 5W-40 engine oil is formulated to deliver exceptional performance in newer and older engine designs, including those with emission control systems. Its proprietary formulation 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 oil drain intervals
  • Enhanced emissions systems protection in a variety of severe conditions

The outstanding performance of Mobil Delvac 1 ESP 5W-40 engine oil is the result of extensive cooperative development work with major equipment builders and application of the latest lubrication technology.

Mobil Delvac 1 ESP 5W-40 diesel engine oil is recommended by ExxonMobil for use in:

  • The latest heavy-duty diesel engines, including those equipped with aftertreatment systems and exhaust gas recirculation (EGR)
  • Diesel applications using older and naturally aspirated conventional designs
  • On-highway engines operating in both high-speed/high-load and stop-and-go conditions
  • Off-highway engines operating in severe low-speed/heavy-load conditions using up to 500 ppm sulfur fuels
  • Virtually all diesel-powered equipment from American and European builders
  • High-performance gasoline engines and mixed fleets
  • Refrigeration units

Features and benefits

  • Formulated with advanced synthetic base stocks to help improve fuel economy*
  • Excellent oxidation performance that helps reduce engine deposits to keep engines running reliably
  • Excellent anti-wear and anti-scuff properties help control wear in heavy-duty operation to help promote long engine life
  • Excellent low-temperature performance allows for increased oil flow to critical bearing surfaces at startup and controls low-temperature sludge formation in stop-and-go service
  • Stay-in-grade shear stability maintains viscosity in severe, high-temperature service, provides wear protection and helps reduce oil consumption
  • Excellent protection against oil thickening and degradation contributes to long drain interval capability, helping to reduce the number of oil changes and oil disposal needs

*Compared to an SAE 15W-40 engine oil. Actual savings are dependent on vehicle engine type, outside temperature, driving conditions and your current engine oil viscosity.

Available viscosity grades

What does this viscosity mean?
  • 5W-40

    Specifications and approvals

    Mobil Delvac 1 ESP 5W-40 engine oil meets or exceeds the requirements of:

    • API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4
    • ACEA E9, E7
    • Caterpillar ECF-3, ECF-2
    • Cummins CES 20086, 20081

    Mobil Delvac 1 ESP 5W-40 engine oil is approved by the following OEMs:

    • Detroit Fluids Specification 93K222, 93K218
    • Mack EO-O Premium Plus
    • MAN M 3575
    • MB-Approval 228.31
    • MTU Oil Category 2.1
    • Volvo VDS-4

    Technical details

    SAE Grade 5W-40
    Viscosity, ASTM D 445
    cSt @ 40ºC


    cSt @ 100ºC 14.7
    CCS, cP, ASTM D 5293 6,330 @ -30ºC
    MRV, cP, ASTM D 4684 22,000 @ -35ºC
    HTHS @ 150ºC, cP, ASTM D 4683 3.7
    Viscosity Index, ASTM D 2270 170
    Sulfated Ash, wt%, ASTM D 874 1
    Total Base #, mg KOH/g, ASTM D 2896         12.1
    Pour Point, ºC, ASTM D 97 -33
    Flash Point, ºC, ASTM D 92 222
    Density @ 15ºC kg/l, ASTM D 4052 0.857

    View product data sheet for Mobil Delvac 1™ ESP 5W-40 engine oil

Related products

Engine oils

Our oils can help to achieve long engine life with extended service intervals.

Heavy-duty grease

Protect hardworking parts from temperature extremes, rust and wear.

Transmission fluids

Get excellent protection against high temperature and high-speed wear.

More Mobil™ resources

Mechanic checking diesel engine oil

Mobil Delvac™ FAQs

Find answers to your product questions and more in our FAQs.

Trucking industry making the change to low viscosity oil

Switching to low viscosity oil

Find out the five reasons more and more people in the trucking industry are making the switch to low viscosity engine oil.

Person using global distributor locator tool

Find a distributor near you

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

Energy lives here