Mobil Delvac™ MX PLUS 15W‑40

Mobil Delvac™ MX PLUS 15W‑40

Mobil Delvac™ MX PLUS 15W-40 is an extra high performance diesel engine oil that provides excellent lubrication of today's diesel engines promoting extended engine life. This extra high performance has been proven in the field in a wide variety of industries, applications, and fleets.


Mobil Delvac™ MX PLUS 15W-40 is formulated from high performance base oils and a superior balanced additive system to provide optimum engine performance in modern diesel 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 Longer gasket and seal life


Recommended by ExxonMobil for use in:

  • Naturally aspirated and turbo-charged diesel powered equipment
  • On-highway light and heavy-duty trucking
  • Off-highway industries including: construction, mining, quarrying, and agriculture


Mobil Delvac™ MX PLUS 15W-40  meets or exceeds the requirements of
Cummins CES 20078
Mobil Delvac™ MX PLUS 15W-40  has the following builder approvals:
MD-Approval 228.3
Volvo VDS-3


Mobil Delvac™ MX  PLUS 15W-40  
SAE Grade 15W-40
Viscosity, ASTM D 445
cSt @ 40ºC 109
cSt @ 100ºC 14.5
Viscosity Index, ASTM D 2270 137
Sulfated Ash, wt%, ASTM D 874 1.4
Total Base # , mg KOH/g, ASTM D 2896 11
Pour Point, ºC, ASTM D 97 -39
Flash Point, ºC, ASTM D 92 226
Density @ 15ºC kg/l, ASTM D 4052 0.877