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Mobil Delvac 1™ ESP 0W-40

Synthetic High Performance Heavy Duty Diesel Engine Oil
Mobil Delvac 1 ESP 0W-40 is a synthetic, high, performance, heavy duty diesel engine oil that helps extend engine life and improve fuel economy in modern diesel engines operating in severe applications.
Mobil Delvac 1 ESP 0W-40 meets the API CK-4 specification utilizing state-of-the-art technology to deliver exceptional performance in modern low emission engines, including those with Exhaust Gas Recirculation (EGR) and After Treatment systems with Diesel Particulate Filters (DPF’s) and Diesel Oxidation Catalysts (DOC’s). It can also be used in refrigeration units and older, well-maintained engines. Mobil Delvac 1 ESP 0W-40 is recommended for use in a wide range of heavy-duty applications and operating environments found in the on-road transport and offroad mining, forestry, construction, and agricultural industries. Mobil Delvac 1 ESP 0W-40 also meets the API SM specification for gasoline engines.

Many modern, low emission diesel engines generate more soot and operate at higher temperatures than older engines. This significantly increases the need for high performance lubricants. In addition, new engines (model-year 2007 and beyond) come equipped with After Treatment devices installed in the engine exhaust stream which will require the use of both API CJ-4 oils and ultralow sulfur diesel fuel to function properly. Further, new engines using EGR will generate even higher levels of acid, soot and heat than older EGR engines due to substantially increased EGR rates compared to previous EGR designs. Top piston rings are located higher, bringing the oil film closer to the combustion area and exposing the lubricant to severe thermal stresses.
Mobil Delvac 1 ESP 0W-40 maintains outstanding performance at significantly higher temperatures than other high performance diesel engine oils. It is also fully compatible with conventional oils. The key benefits include:

FeaturesAdvantages and Potential Benefits
Excellent for light and heavy duty diesel engines including those with EGR and/or DPFs (Diesel particulate filters)One engine oil for mixed fleet operations
Exceptional resistance to viscosity breakdownProvides outstanding wear protection
Superb soot-handling performanceHelps keep engines clean
Outstanding thermal and oxidation stabilityExcellent resistance to sludge build-up and high temperature deposits
Inherent stay-in-grade shear stabilityWear protection and reduced oil consumption; maintains viscosity in severe, high temperature service
Advanced formulation and viscometricsImproved fuel economy (vs. 15W-40 grade)
Exceptional low temperature pumpabilityEasy engine start-up and wear protection
Potential for extended oil-drain capabilityHelps to improve operating efficiency and control overall cost

Mobil Delvac 1 ESP 0W-40 is recommended for use in 4-stroke diesel engines, including modern low emission engines with Exhaust Gas Recirculation (EGR), After Treatment 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
  • High performance gasoline engines and mixed fleets
  • Refrigeration units

Mobil Delvac 1 ESP 0W-40 meets or exceeds the following industry and builder specifications: 0W-40
Caterpillar ECF-3
Cummins CES 20086, 20081; Ford WSS-M2C171-F1 
Mack EO-N Premium Plus 03

Mobil Delvac 1 ESP 0W-40


SAE Grade0W-40
Viscosity, ASTM D 445 
cSt @ 40ºC87
cSt @ 100ºC15.2
Viscosity Index, ASTM D 2270186
Sulfated Ash, wt%, ASTM D 8740.99
Total Base #, mg KOH/g, ASTM D 28967.7
Pour Point, ºC, ASTM D 97-45
Flash Point, ºC, ASTM D 92215
Density @ 15ºC kg/l, ASTM D 40520.843