Mobil Super Diesel TM CI-4 PLUS 15W-40


Mobil SuperTM Diesel TM CI-4 Plus 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 this product delivers outstanding performance in modern, high-output engines including those with Exhaust Gas Recirculation (EGR), and also older engines.  Mobil Super Diesel TM CI-4 Plus 15W-40 meets the requirements of the API CI-4 PLUS service category and is approved by Tata Motors under their TSS 6576 specification.

Mobil Super Diesel TM CI-4 Plus 15W-40 is recommended for use in a wide range of heavy duty applications and operating environments found in the trucking, mining, construction, quarrying and agricultural industries.  The outstanding performance reserve of Mobil Super Diesel TM CI-4 Plus 15W-40 is the result of extensive cooperative development work with Tata Motors.   As a result this product provides excellent control of oil thickening due to soot build-up and exposure to higher temperatures together with outstanding resistance to oxidation, corrosion, wear, and high temperature deposits.



Features and Benefits

The key benefits of Mobil Super Diesel TM CI-4 Plus 15W-40 include:

Features  Advantages and Potential Benefits
Outstanding thermal and oxidation stability Reduced low temperature sludge build-up and high temperature deposits
Extended TBN reserves Improved soot handling and extended drain intervals
Stay-in-grade shear stability Reduced oil consumption and better wear protection
Maintains viscosity in severe, high temperature service 
Excellent low temperature pumpability Easier engine start-up and reduced wear
Strong corrosion resistance Longer life of critical wear surfaces


  • Tata vehicle engines which require a Tata Motors TSS 6576 approved lubricant
  • Recommended for use in high performance diesel applications including turbo-charged, low emission engine designs featuring EGR technology
  • On highway applications operating in both high speed/high load and short haul pick-up/delivery
  • On highway heavy duty trucking and off highway including: construction, mining, quarrying, and agriculture
  • Recommended by Tata Motors for selected Tata Diesel passenger vehicles including all Tata Sumo Gold variants and Tata Safari MY 14 variants. Consult vehicle manual for specific lubricant requirements.

Specifications and Approvals  

Mobil Super Diesel TM CI-4 Plus 15W-40 meets or exceeds the requirements of: 

Mobil Super Diesel TM CI-4 Plus 15W-40 has the following Builder Approval: 
Tata Motors TSS 6576 X


Typical Properties

Mobil Super Diesel TM CI-4 Plus 15W-40    
SAE Grade 15W-40
Viscosity, ASTM D 445  
cSt @ 40ºC 109
cSt @ 100ºC 14.5
Viscosity Index, ASTM D 2270 136
MRV @ -25°C, cP, ASTM D 4684 20,400
HTHS @ 150ºC, cP, ASTM D4683 4.2
Sulfated Ash, wt%, ASTM D 874 1.35
Total Base #, mg KOH/g, ASTM D 2896 11
Pour Point, ºC, ASTM D 97 -33
Flash Point, ºC, ASTM D 92 220
Density @ 15ºC kg/l, ASTM D 4052 0.877

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. MSDSs are available upon request through your sales contact 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.