Mobil Delvac 1 ESP 5W-40  

Mobil Commercial Vehicle Lube, Australia

Supreme Performance Heavy Duty Diesel Engine Oil

Product Description

Mobil Delvac 1 ESP 5W-40 is a fully synthetic supreme 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 utilizes state-of-the-art technology to deliver exceptional performance in modern low emission engines, including those with Exhaust Gas Recirculation (EGR) and Aftertreatment systems with Diesel Particulate Filters (DPF’s) and Diesel Oxidation Catalysts (DOC’s), as well as refrigerated units and older, well-maintained engines. Mobil Delvac 1 ESP 5W-40 is recommended for use in a wide range of heavy-duty applications and operating environments found in the on-road transport and off-road mining, construction, and agricultural industries. Mobil Delvac 1 ESP also meets the requirements of the API SM specification for gasoline engines used in mixed fleets.

The outstanding performance of Mobil Delvac 1 ESP 5W-40 is the result of extensive cooperative development work with major equipment builders and application of the latest lubrication technology. As a result, this product meets or exceeds the requirements of the latest API, ACEA, and Global industry specifications for diesel engine oils, as well as the requirements of virtually all major American, and European engine manufacturers.


Features and Benefits

Many modern, low emission diesel engines generate more soot and operate at higher temperatures than older engines. This significantly increases the need for supreme performance lubricants. In addition, new engines (model-year 2007 and beyond) come equipped with aftertreatment devices installed in the engine exhaust stream which will require the use of both API CJ-4 oils and ultra-low sulfur fuels 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 chamber and exposing the lubricant to severe thermal stresses. Mobil Delvac 1 ESP 5W-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: 

 Features Advantages and Potential Benefits 
 Meets or exceeds demanding specifications of major OEMs One engine oil for mixed fleet operations
 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
 Long drain capability Increased operating efficiency and lower overall cost
 Component compatibility Long gasket and seal life, extended service intervals



 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
Caterpillar ECF-3, ECF-2X
Cummins CES 20081X
Twin Disc S364AX


Mobil Delvac 1 ESP has the following builder approvals: 5W-40
Detroit Fluids Specifications 93K218, 93K214X
Deutz DQC III-10 LAX
Mack EO-O Premium Plus, EO-N Premium Plus 03X
MB-Approval 228.31, 235.27X
MTU Category 2.1
Volvo VDS-4, VDS-3X


Mobil Delvac 1 ESP is recommended by ExxonMobil for use in applications requiring:5W-40
MAN M 3275-1X


Typical Properties

 Mobil Delvac 1 ESP 5W-40 
SAE Grade5W-40
Viscosity, ASTM D 445 
cSt @ 40ºC98
cSt @ 100ºC14.7
Viscosity Index, ASTM D 2270156
Sulfated Ash, wt%, ASTM D 8741.0
Total Base #, mg KOH/g, ASTM D 289610.1
Pour Point, ºC, ASTM D 97-48
Flash Point, ºC, ASTM D 92249
Density @ 15ºC kg/l, ASTM D 40520.85


Health and Safety

Based on available information, this product is not expected to produce adverse effects on health when used for the intended application and the recommendations provided in the Material Safety Data Sheet (MSDS) are followed.  MSDS's are available upon request through your sales contract office, or via the Internet.  This product should not be used for purposes other than its intended use.  If disposing of used product, take care to protect the environment.

The Mobil logotype, the flying horse design, and Delvac 1 are trademarks of Exxon Mobil Corporation, or one of its subsidiaries.

Mobil Oil Australia Pty Ltd
A.B.N. 88 004 052 984
12 Riverside Quay
Southbank Vic 3006
+61 3 8633 8444

Typical Properties are typical of those obtained with normal production tolerance and do not constitute a specification.  Variations that do not affect product performance are to be expected during normal manufacture and at different blending locations.  The information contained herein is subject to change without notice. All products may not be available locally. For more information, contact your local ExxonMobil contact or visit 
ExxonMobil is comprised of numerous affiliates and subsidiaries, many with names that include Esso, Mobil, or ExxonMobil. Nothing in this document is intended to override or supersede the corporate separateness of local entities. Responsibility for local action and accountability remains with the local ExxonMobil-affiliate entities.