Skip to main content

Mobil Delvac 1™ ESP

High performance heavy-duty diesel engine oil

Mobil Delvac 1 ESP is a fully synthetic, high performance heavy-duty diesel engine oil that helps extend engine life while providing long drain capability and potential fuel economy for modern diesel engines operating in severe applications.

Mobil Delvac 1 ESP maintains outstanding performance at significantly higher temperatures than other high-performance diesel engine oils and with its long drain capability potentially can help increase operating efficiency and lower overall cost. It is also fully compatible with conventional oils.

We recommend it for use in a wide range of heavy-duty applications and operating environments, such as:
  • All super high performance diesel applications, including modern low emission engine designs with Exhaust Gas Recirculation (EGR), After treatment systems with Diesel Particulate Filters (DPFs) and Diesel Oxidation Catalysts (DOCs)
  • 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
  • Virtually all diesel-powered equipment from American and European equipment builders
  • High-performance gasoline engines and mixed fleets
  • Refrigeration units

Features and benefits

  • Outstanding thermal and oxidation stability helps reduce engine deposits and sludge build up to keep engines running reliably
  • Inherent stay-in-grade shear stability maintains viscosity in severe, high temperature service provides wear protection and together with low volatility helps reduce oil consumption
  • Exceptional low temperature pumpability enables easy start up circulation and can provide great wear protection to help prolong engine life 
  • Enhanced TBN reserves and outstanding resistance to corrosion improves deposit control and corrosion protection help extend life of critical wear surfaces and oil drain intervals 
  • Enhanced film strength at high temperatures helps reduce engine scuffing and bore polishing
  • Advanced formulation and viscometrics helps improve fuel economy

Available viscosity grades

What does this viscosity mean?
  • 5W-40

    Specifications and approvals

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

    • API CJ-4/CI-4 PLUS/CI-4/CH-4/SM/SL
    • ACEA E7, E9
    • Caterpillar ECF-3, ECF-2
    • Cummins CES 20081
    • Twin Disc S364A

    Mobil Delvac 1 ESP 5W-40 has the following builder approvals:

    • Detroit Diesel Power Guard Oil Specification 93K218, 93K214
    • Deutz DQC III-10 LA
    • Mack EO-O Premium Plus, EO-N Premium Plus 03
    • MAN M 3277
    • MB-Approval 228.31, 235.27
    • MTU Category 2.1
    • Volvo VDS-4, VDS-3

    Mobil Delvac 1 ESP 5W-40 is recommended by ExxonMobil for use in applications requiring:

    • API CG-4

    Technical details

    SAE Grade 5W-40
    Viscosity, ASTM D 445
    cSt @ 40ºC 98
    cSt @ 100ºC 14.7
    Viscosity Index, ASTM D 2270 156
    Sulfated Ash, wt%, ASTM D 874 1.0
    Total Base #, mg KOH/g, ASTM D 2896         10.1
    Pour Point, ºC, ASTM D 97 -48
    Flash Point, ºC, ASTM D 92 249
    Density @ 15ºC kg/l, ASTM D 4052 0.85


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.

Barry Lesmeister on big savings with Mobil Delvac testimonial

Good business decision

Learn why Lesmeister Transportation upgraded its entire fleet to Mobil Delvac 1™ and how it reaped big benefits.

Mobil Delvac find products distributor locator

Find a distributor near you

Use our locator tool to find out where to buy Mobil Delvac™ products near you.