Mobil Delvac™ MX 15W-40

Mobil Delvac™ MX 15W-40

Mobil Delvac™ MX 15W-40 is an extra high performance diesel engine oil that provides excellent lubrication of today's diesel engines promoting extended engine life. As a result, this product meets or exceeds the specifications of virtually all major European and American engine manufacturers. This extra high performance has been proven in the field in a wide variety of industries, applications, and mixed fleets.The advanced chemistry of this product provides outstanding performance in both modern, demanding low-emission diesel engines and older diesel engines operating on low or high sulphur fuel. Mobil Delvac™ MX 5W-40 combines a blend of high performance base stocks with a progressive additive system to provide superior control of oil thickening due to soot build-up and high temperatures as well as outstanding resistance to oxidation, corrosion, and high temperature deposits.

Features and Benefits

High output, low emission diesel engines significantly increase the demands on engine lubricants. Tighter engine designs reduce oil consumption, resulting in less fresh oil make-up to replenish depleted additives. Top piston fire 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. Increased fuel injector pressure and retarded timing improve fuel burn efficiency, but also increase engine temperatures and increase soot loads. Mobil Delvac™ MX 15W-40 is formulated from high performance base oils and a superior balanced additive system to provide optimum engine performance in modern diesel and gasoline engines as well as older models. The key benefits include:

Features Advantages and Potential Benefits
High thermal and oxidation stability Reduced sludge build-up, deposits and viscosity increase
TBN reserves Deposit control and acid neutralisation
Stay-in-grade shear stability Wear protection and viscosity control
Advanced detergency/dispersancy Cleaner engines and longer component life
Improved soot handling Improved viscosity control and used oil pumpability
Excellent low temperature properties Start-up wear protection
Component compatibility
Meets demanding specifications of key OEMs
Longer gasket and seal life
One engine oil for mixed fleet operations


Recommended by ExxonMobil for use in:

  • Naturally aspirated and turbo-charged diesel powered equipment from leading Japanese, European, and American manufacturers
  • On-highway light and heavy-duty trucking
  • Off-highway industries including: construction, mining, quarrying, and agriculture
  • Mixed fleet applications

Specifications and Approvals

Mobil Delvac™ MX 15W-40 meets or exceeds the requirements of the following industry and builder specifications:
Caterpillar ECF-2 X
Cummins 20077, 20076 X
Mobil Delvac™ MX 15W-40 has the following builder approvals:
MB-Approval 228.3 X
Volvo VDS-3 X
Renault Trucks RLD-2 X
MTU Oil Category 2 X
Mobil Delvac™ MX 15W-40 is recommended by ExxonMobil for use in applications requiring:
API CG-4/ CF-4/ CF X
Volvo VDS-2 X
Renault Trucks RLD X
Mack EO-M X
Cummins CES 20072, 20071 X
Detroit 7SE 270 (4-Stroke Cycle) X

Typical Properties

Mobil Delvac MX 15W-40
SAE Grade 15W-40
Viscosity, ASTM D 445
cSt @ 40ºC 104
cSt @ 100ºC 14.3
Viscosity Index, ASTM D 2270 140
Sulfated Ash, wt%, ASTM D 874 1.1
Total Base # , mg KOH/g, ASTM D 2896 10
Pour Point, ºC, ASTM D 97 -30
Flash Point, ºC, ASTM D 92 215
Density @ 15ºC kg/l, ASTM D 4052 0.88