Mobil™ Diesel Special 20W-40

Mobil Diesel Special 20W40

Multigrade Diesel Engine Oil

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


Mobil Diesel Special 20W-40

Multigrade Diesel Engine Oil

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


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. MSDS's are available upon request through your sales contract 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.