Mobil Delvac™ Extreme

Premium synthetic blend diesel engine oil

Mobil Delvac™ Extreme 10W-30 and 15W-40 are premium synthetic blend, high-performance diesel engine oils that help extend engine life while providing long drain capability for modern diesel engines operating in extreme conditions. They are recommended for use in a wide range of heavy-duty applications and operating environments found on- and off-highway, including engines operating under heavy loads.

Fully backward compatible, Mobil Delvac Extreme engine oils deliver exceptional performance in both newer and older heavy-duty engines. Their boosted formulation provides:

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


Mobil Delvac Extreme engine oils deliver updated high-temperature performance under the extreme operating environments found in the trucking, mining, construction and agricultural industries. Accordingly, these oils meet or exceed the requirements of API CK-4, CJ-4, CI-4 PLUS, CI-4 and CH-4 service categories, as well as key original equipment manufacturer (OEM) requirements.

Mobil Delvac Extreme diesel engine oils are recommended by ExxonMobil for use in:
  • Modern, high-performance diesel engines with exhaust gas recirculation (EGR), after treatment systems with diesel particulate filters (DPFs) and diesel oxidation catalysts (DOCs)
  • Naturally aspirated and turbocharged, diesel-powered engines
  • On-highway light- and heavy-duty trucking, including mixed fleets
  • Off-highway industries, including mining, construction, quarrying and agriculture

*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.


Features and benefits

  • 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

Specifications, approvals and technical details

Specifications and approvals  

Mobil Delvac Extreme 10W-30 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
  • Cummins CES 20086, 20081
  • JASO DH-2
Mobil Delvac Extreme 10W-30 engine oil is approved by the following OEMs:
  • Detroit Fluids Specification 93K222, 93K218
  • Deutz DQC II-10 LA
  • Mack EOS-4.5, EO-O Premium Plus
  • MB-Approval 228.31
  • Renault Trucks RLD-4, RLD-3
  • MAN M 3575
  • Volvo VDS-4.5, VDS-4

Technical details  

Viscosity, ASTM D 445  
cSt @ 40ºC 81.1
cSt @ 100ºC 11.8
CCS, cP, ASTM D 5293 6,600 @ -25ºC
MRV, cP, ASTM D 4684 18,400 @ -30ºC
HTHS @ 150ºC, cP, ASTM D 4683 3.6
Viscosity Index, ASTM D 2270 140
Sulfated Ash, wt%, ASTM D 874 1
Total Base Number, mg KOH/g, ASTM D 2896 10.3
Pour Point, ºC, ASTM D 97 -42
Flash Point, ºC, ASTM D 92 219
Density @15ºC kg/l, ASTM D 4052 0.867

View product data sheet for Mobil Delvac™ Extreme 10W-30 engine oil.

Specifications and approvals  

Mobil Delvac Extreme 15W-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
  • Cummins CES 20086, 20081
  • JASO DH-2
Mobil Delvac Extreme 15W-40 meets or exceeds the following industry and/or builder specifications:
  • Allison TES 439
  • Detroit Fluids Specification 93K222, 93K218
  • Deutz DQC II-10 LA
  • Mack EOS-4.5, EO-O Premium Plus
  • MB-Approval 228.31
  • MTU Oil Category 2.1
  • Renault Trucks RLD-4, RLD-3
  • MAN M 3575
  • Volvo VDS-4.5, VDS-4

Technical details  

SAE Grade 15W-40
Viscosity, ASTM D 445  
cSt @ 40ºC 107.4
cSt @ 100ºC 14.3
CCS, cP, ASTM D 5293 6,100 @ -20ºC
MRV, cP, ASTM D 4684 16,900 @ -25ºC
HTHS @ 150ºC, cP, ASTM D 4683 4.1
Viscosity Index, ASTM D 2270 140
Sulfated Ash, wt%, ASTM D 874 1
Total Base Number, mg KOH/g, ASTM D 2896 10.3
Pour Point, ºC, ASTM D 97 -33
Flash Point, ºC, ASTM D 92 221
Density @15ºC kg/l, ASTM D 4052 0.872

View product data sheet for Mobil Delvac™ Extreme 15W-40 engine oil.

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