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Mobil Delvac MX 15W-40 

Mobil Delvac MX™ 15W-40

High performance diesel engine oil

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.

It 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. This oil will provide outstanding protection in the most demanding diesel engines of Caterpillar, Cummins, Detroit Diesel, 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.

It is recommended by ExxonMobil for use in:

  • High-performance diesel applications including pre-2007 turbocharged, low emission engine designs, including those featuring EGR technology.
  • On-highway applications operating in both high-speed/high-load and short-haul, pick-up/delivery.
  • Off-highway applications operating in severe low-speed/heavy-load conditions.
  • Modern marine high-speed diesel engines, including Caterpillar, Cummins, Volvo, Daihatsu, and Yanmar.
  • High-performance gasoline engines and mixed fleet operators.
  • Diesel-powered equipment from American and Japanese original equipment manufacturers.
  • On-highway heavy-duty trucking and off-highway including: construction, mining, quarrying, and agriculture.

Also see the Mobil Delvac MX 15W-40 product data sheet or find a material safety data sheet.

FeaturesAdvantages & 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 stability
Reduced 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

Mobil Delvac MX meets or exceeds the following industry and builder specifications:
Caterpillar ECF-2
Cummins CES 20078 / 20077/ 20076

Mobil Delvac MX has the following builder approvals:
Mack EO-M Plus
MB-Approval 228.3
Volvo VDS-3
MAN M 3275-1

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

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