Mobil Delvac Super 20W-50

High performance diesel engine oils

Mobil Delvac Super 20W-50 is high performance diesel engine oil that provides proven engine protection of diesel engines operating in severe service applications. Mobil Delvac Super 20W-50 engine oil is recommended by ExxonMobil for use in a wide range of heavy-duty applications and operating environments found in the trucking, construction, and agricultural industries.



Features and Benefits

The key benefits of Mobil Delvac Super 20W-50 include:

  • Enhanced protection for two and four cycle diesel engines in the most demanding on-and off-highway service
  • Prolonged engine life
  • Outstanding control of high temperature deposits
  • Excellent soot control
  • Reduced engine scuffing and bore polishing due to enhanced high temperature/high shear viscosity retention
  • Improved low temperature sludge control in stop and- go service
  • Easy starting in cold weather conditions
  • Extended TBN quality reserve for long term wear and deposit control
  • Reduced oil consumption due to improved high temperature performance


Mobil Delvac Super 20W-50 is recommended by ExxonMobil for use in the most severe applications of modern on- and off-highway diesel engines. It extends engine life between overhauls in high speed/high load operations and in pickup/delivery operation modes in both two-cycle and four-cycle engines.  Applications include:

  • Diesel-powered equipment from leading diesel engine manufacturers
  • On-highway light and heavy-duty trucking
  • Off-highway industries including: trucking, construction, quarrying, and agriculture
  • Mixed fleets


Specifications and Approvals

Mobil Delvac Super 20W-50 is recommended by ExxonMobil for use in applications requiring: 


Typical Properties

Mobil Delvac Super 20W-50MethodUnit 
CMCS Code  978044
SAE Grade  20W-50
AppearanceVisual Bright and Clear
Viscosity @ 40ºCASTM D 445cSt148.9
Viscosity @ 100ºCASTM D 445cSt17.6
CCS Viscosity @ -15ºCASTM D 5293cP8990
MRV @ -20ºCASTM D 4684cP55600
HTHS @ 150ºCASTM D 4683mPa-s3.74
Total Base Number (TBN)ASTM D 2896mg KOH/g8.2
Sulphated AshASTM D 874wt%0.8
Viscosity IndexASTM D 2270 129.8
Foam Seq. I (Tend. / Stab.)ASTM D 892ml/ml10/0
Foam Seq. II (Tend. / Stab.)ASTM D 892ml/ml50/0
Pour PointASTM D 97ºC-20
Flash PointASTM D 92ºC200
ZincASTM D 4951wt%0.141
PhosphorusASTM D 4951wt%0.128


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.