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Mobil Delvac MX™ 15W-40

High Performance Diesel Engine Oil

Product Description

Mobil Delvac MX™ 15W-40 is a high performance diesel engine oil that helps extend engine life in severe on and off highway applications. The advanced chemistry of these products delivers exceptional performance in both modern, high-output engines including those with Exhaust Gas Recirculation (EGR), as well as older engines operating on either low or high sulfur fuels. As a result, Mobil Delvac MX 15W-40 meets or exceeds the API CI-4 PLUS service category.

Mobil Delvac MX 15W-40 is recommended by ExxonMobil for use in a wide range of heavy duty applications and operating environments found in the trucking, mining, construction, quarrying, marine and agricultural industries. These products will provide outstanding protection in the most demanding diesel engines of Caterpillar, Cummins, Detroit, Mack, Mercedes Benz, Navistar, Volvo, and others. Mobil Delvac MX 15W-40 also meets or exceeds the API SL specification for gasoline engines and mixed fleets.

The outstanding performance reserve of Mobil Delvac MX 15W-40 is the result of extensive cooperative development work with major Original Equipment Manufacturers (OEMs) and advanced additive chemistry with patented Trimer technology. These enhancements assure excellent control of oil thickening due to soot build-up and exposure to higher temperatures and provide outstanding resistance to oxidation, corrosion, wear, and high temperature deposits.


Features and Benefits

Modern high output diesel engines including those using EGR technology generate higher levels of soot and run at higher temperatures than older, naturally aspirated engines, which significantly increases the demands on engine lubricants. These engine designs reduce oil consumption, resulting in less fresh oil makeup to replenish depleted additives. Top piston rings are located higher on the piston bringing the oil film closer to the combustion chamber where higher temperatures increase thermal stress on the lubricant.  Higher fuel injector pressure and retarded timing improve exhaust emission control, but also increase engine temperatures and increase soot loads, including those engines operating with EGR. The key benefits include:

FeaturesAdvantages and Potential Benefits
Outstanding thermal and oxidation stabilityReduced low temperature sludge build-up and high temperature deposits
Extended TBN reservesImproved soot handling and extended drain intervals
Stay-in-grade shear stabilityReduced oil consumption and wear protection Maintains viscosity in severe, high temperature service 
Excellent low temperature pumpabilityEasier engine start-up and reduced wear
Superb resistance to corrosionLonger life of critical wear surfaces



      Recommended by ExxonMobil for use in:


Specifications and Approvals

Mobil Delvac MX 15W-40 meets or exceeds the requirements of the following industry and builder specifications:15W-40
Caterpillar ECF-2X
Cummins CES 20078 / 20077 / 20076X


Mobil Delvac MX has the following builder approvals:15W-40
MB-Approval 228.3X
Volvo VDS-3X
MAN M 3275-1X


Mobil Delvac MX is recommended by ExxonMobil for use in applications requiring:15W-40
Mack EO-MX
Cummins CES 20072 / 20071X
Detroit 7SE 270 (4-Stroke Cycle)X
Volvo VDS-2X


Typical Properties

Mobil Delvac MX 15W-40 
SAE Grade15W-40
Viscosity, ASTM D 445 
cSt @ 40ºC123
cSt @ 100ºC15.6
CCS, cP, ASTM D 52936000 @ -20ºC
MRV, cP, ASTM D 468429,000 @ -25°C
HTHS @ 150ºC, cP, ASTM D46834.3
Viscosity Index, ASTM D 2270133
Sulfated Ash, wt%, ASTM D 8741.3
Total Base #, mg KOH/g, ASTM D 289612
Pour Point, ºC, ASTM D 97-30
Flash Point, ºC, ASTM D 92230
Density @ 15ºC kg/l, ASTM D 40520.879


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. MSDSs are available upon request through your sales contact 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 Pegasus design, and Delvac are trademarks of Exxon Mobil Corporation, or one of its subsidiaries. 


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