Mobil Delvac™ Legend 15W-40 CNG/LNG

Mobil commercial-vehicle-lube , Greece

Premium Natural Gas Engine Oil

Product Description

Mobil DelvacTM Legend 15W-40 CNG/LNG is a premium fleet engine oil specifically formulated to provide reliable protection for trucks and buses using Compressed Natural Gas (CNG) or Liquefied Natural Gas (LNG). Mobil DelvacTM Legend 15W-40 CNG/LNG is formulated from high quality base stocks and a balanced additive system. This advanced medium ash formulation provides excellent oxidation, nitration, and thermal stability to minimize combustion chamber ash deposits. Mobil DelvacTM Legend 15W-40 CNG/LNG lubricates with less varnish, sludge, and carbon build-up under the most severe operating conditions.


Features and Benefits

Modern high output, high speed, lean-burn diesel type engines using natural gas fuels place severe demands on engine lubricants. Mobil DelvacTM Legend 15W-40 CNG/LNG is formulated to strict standards to deliver reliable engine performance in modern diesel type engines using natural gas as the primary fuel. The key benefits include:

•  High thermal and oxidation stability helps control sludge build-up and deposits.

•  Reserve TBN neutralizes oxy acids and nitrates to reduce deposits.

•  Shear stability reduces oil consumption and provides bearing wear and cylinder liner scuff protection.

•  Effective detergency/dispersancy keeps engines cleaner.

•  Low levels of Zinc and Phosphorous help extend catalytic converter life.



Recommended by ExxonMobil for use in:

•  Spark ignited CNG and LNG-fueled lean-burn engines.

•  Dual fuel engines using diesel fuel for start-up and 15% diesel pilot fuel with CNG/LNG.

•  On-highway light and heavy-duty trucks and busses.


Specifications and Approvals

This product meets or exceeds the requirements of:

Cummins CES 20074


Properties and Specifications




SAE 15W-40

Ash, Sulfated, mass%, ASTM D874


Density @ 15.6 C, kg/m3, ASTM D4052


Flash Point, Cleveland Open Cup, °C, ASTM D92


Kinematic Viscosity @ 100 C, mm2/s, ASTM D445


Kinematic Viscosity @ 40 C, mm2/s, ASTM D445


Pour Point, °C, ASTM D97


Total Base Number, mgKOH/g, ASTM D2896



Health and safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @

All trademarks used herein are trademarks or registered trademarks of Exxon Mobil Corporation or one of its subsidiaries unless indicated otherwise.


ExxonMobil Lubricants & Specialties


Typical Properties are typical of those obtained with normal production tolerance and do not constitute a specification.  Variations that do not affect product performance are to be expected during normal manufacture and at different blending locations.  The information contained herein is subject to change without notice. All products may not be available locally. For more information, contact your local ExxonMobil contact or visit 
ExxonMobil is comprised of numerous affiliates and subsidiaries, many with names that include Esso, Mobil, or ExxonMobil. Nothing in this document is intended to override or supersede the corporate separateness of local entities. Responsibility for local action and accountability remains with the local ExxonMobil-affiliate entities.