Mobil Delvac 1™ ESP heavy-duty diesel engine oil

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Inland and Coastal
Extended Life
Enhanced Wear Protection
Low Temperature

Product Information

Technical resources

Storage and Handling | Marine Lubricants | ExxonMobil Marine

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Fishing vessels extend oil change intervals to 3000 hours | ExxonMobil marine

M.G. Kailis, a leading Australian seafood company, changed to Mobil Delvac 1™ ESP on their finishing vessels that benefitted with fuel savings and oil change intervals.

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Maritime operators received next generation Mobil Delvac™ diesel engine oils – Mobil Delvac™ 1300 Super and synthetic Mobil Delvac 1™ ESP 5W-40 on 1st December 2016.

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Features and Benefits

Mobil Delvac 1 ESP 5W-40 maintains outstanding performance at significantly higher temperatures than other high performance diesel engine oils.  It also delivers exceptional low temperature fluidity and pumpability at low temperatures for smooth starting in cold down to -35°C.

Mobil Delvac 1 ESP 5W-40 is formulated with advanced synthetic basestocks to help improve fuel economy1.
Features Advantages and Potential Benefits
Meets or exceeds demanding specifications of major OEM One engine oil for mixed diesel fleet operations
Long drain capability Increased operating efficiency and lower overall cost
Component compatibility Long gasket and seal life, extended service intervals
Low ash formulation meeting API CK-4 and CJ-4 requirements Long emissions aftertreatment (DPF, DOC and SCR) life
Outstanding thermal and oxidation stability Reduced low temperature sludge build-up and high temperature deposits
Enhanced film strength at high temperatures Reduced engine scuffing and bore polishing
Inherent stay-in-grade shear stability Wear protection and reduced oil consumption; maintains viscosity in severe, high temperature service
Advanced formulation and viscometrics Improved fuel economy
Low volatility Reduced oil consumption
Exceptional low temperature pumpability Easy engine start-up and reduced wear
Enhanced TBN quality reserve Deposit control and extended drain capability
Outstanding resistance to corrosion Extended life of critical wear surfaces
1Compared 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.


Mobil Delvac 1 ESP 5W-40 is recommended for use in all super high performance diesel applications, including modern low emission engine designs with Exhaust Gas Recirculation (EGR), Aftertreatment systems with Diesel Particulate Filters (DPF’s) and Diesel Oxidation Catalysts (DOC’s). These applications include the following:
  • 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

Specifications and Approvals

Mobil Delvac 1 ESP meets or Exceeds the requirements of: 5W-40
API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4 X
Caterpillar ECF-3 X
Cummins CES 20081 X
Mobil Delvac 1 ESP is approved by the following OEMs: 5W-40
Detroit Fluids Specification 93K218 X
Mack EO-O Premium Plus X
MAN M 3575 X
MB-Approval 228.31 X
MTU Oil Category 2.1 X
Volvo VDS-4 X

Typical Properties

Mobil Delvac 1 ESP
SAE Grade 5W-40
Total Base Number, mg KOH/g, ASTM D 2896 12.1
CCS, cP, ASTM D 5293 6330 @ -30C
MRV, cP, ASTM D 4684 22000 @-35C
HTHS @ 150ºC, cP, ASTM D4683 3.7
Viscosity, ASTM D 445

cSt @ 40ºC 81.1
cSt @ 100ºC 13.56
Viscosity Index, ASTM D 2270 170
Density @ 15.6ºC kg/L, ASTM D 4052 0.857
Pour Point, ºC, ASTM D 97 -33
Flash Point, ºC, ASTM D 92 222
Sulfated Ash, wt%, ASTM D 874 1
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    M.G. Kailis, a leading Australian seafood company, changed to Mobil Delvac 1™ ESP on their finishing vessels that benefitted with fuel savings and oil change intervals.

    Learn more
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    Almost a decade of protection and cleanliness

    See the results inside a Cummins KTA38 marine diesel engine after running Mobil Delvac 1™ ESP engine oil for almost a decade.

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