Mobil Diesel™ Special 20W-40


Mobil Diesel Special 20W-40 is a mulitgrade diesel engine oil formulated with an optimised combination of base oils and a balanced additive system.

Features and Benefits

Features Advantages and Potential Benefits
Good protection against rust and corrosion Longer equipment life and reduced operating costs
Thermal and oxidation stability Controls sludge build-up and deposits


  • Diesel and gasoline powered equipment where API CD/SF level performance is required
  • On-highway light and medium duty trucking 
  • Off-highway industries including: construction, quarrying, and agriculture


Specifications and Approvals

Mobil Diesel Special 20W-40 is recommended by ExxonMobil for use in applications requiring 20W-40

Typical Properties

Mobil Diesel Special 20W-40
Viscosity, ASTM D 445
cSt @ 40º C 121
cSt @ 100ºC 14.2
Viscosity Index, ASTM D 2270 118
Sulfated Ash, wt%, ASTM D 874 0.9
Total Base # , mg KOH/g, ASTM D 2896 6.8
Pour Point, ºC, ASTM D 97 -30
Flash Point, ºC, ASTM D 92 238
Density @ 15ºC kg/l, ASTM D 4052 0.882