Product Description

Mobilgard ADL Series by ExxonMobil is a high performance family of increased dispersancy engine oils for high BMEP medium and high-speed diesel engines operating on distillate and MDO fuels. These advanced diesel lubricants are available in both SAE 30 and 40 grades to suit most marine engine viscosity requirements. As a result of a special balance of detergent and dispersant properties these oils provide not only increased resistance to cylinder liner lacquer formation in severe service applications, but also assist in sludge and deposit removal. Use of Mobilgard ADL Series oils avoids high oil consumption associated with cylinder liner lacquering, improves overall engine cleanliness and can increase time between engine overhauls. Superior load carrying properties minimise piston ring and liner wear, and also make Mobilgard ADL Series lubricants suitable for marine gearing applications.

Features and Benefits

Key features and potential benefits include:

Mobilgard ADL Series oils have demonstrated superior performance in the latest model diesel engines, including engines of MAN BandW Alpha, Caterpillar (3600 Series), Deutz, and Wartsila. In extensive field testing on these engines, Mobilgard ADL Series oils corrected many problems normally associated with severe service engines operating on lower quality fuels. Results included dramatically reduced oil consumption , significantly reduced liner lacquering and extended periods between overhauls. These advanced diesel lubricants possess excellent water separation, rust and corrosion resistance properties.

Features Advantages and Potential Benefits
Increased thermal and oxidation stability Improved engine cleanliness, reduced liner lacquering, reduced top deck sludge, reduced piston ring groove deposits and bore polishing
Superior wear protection Extends the life of critical wear surfaces
Enhanced detergency/dispersancy capability Reduced deposits especially in the ring belt area which leads to extended cylinder overhauls and reduced oil consumption
Stay-in-grade shear stability Reduced oil consumption and improved bearing protection
High TBN levels Prevents corrosive wear due to higher sulphur fuels
Broad range of engine applications One severe service engine lubricant for all shipboard applications


Mobilgard ADL Series lubricants are intended for use in high BMEP engines and in severe duty engine applications where the nature of the fuel and service requires a greater level of detergency/dispersancy and liner lacquer control than is offered by most diesel engine lubricants.

Meets the requirements of many major medium-speed marine diesel engine builders

Specifications and Approvals

This product has the following approvals: ADL 30 ADL 40
General Electric Fundamental Approval (letter on file) X
Caterpillar/MaK 4-Stroke Medium Speed Diesel Engine (Distillate) X
MAN Energy Solutions Augsburg (Heritage MAN B&W) 28/33D engines X
MAN Energy Solutions Augsburg (Heritage MAN B&W) 4 Stroke medium speed engines for Alternating Distillate / LNG operati X X
MTU Oil Category 2 X X
WARTSILA Medium Speed Diesel Engine X X
This product is recommended for use in applications requiring: ADL 30 ADL 40
MAN 270 X X

Properties and Specifications

Property ADL 30 ADL 40
Grade SAE 30 SAE 40
Ash, Sulfated, mass%, ASTM D874 1.4 1.4
Flash Point, Cleveland Open Cup, °C, ASTM D92 230 239
Kinematic Viscosity @ 100 C, mm2/s, ASTM D445 11.5 14.7
Kinematic Viscosity @ 40 C, mm2/s, ASTM D445 90 132
Pour Point, °C, ASTM D97 -30 -21
Total Base Number, mgKOH/g, ASTM D2896 12 12
Viscosity Index, ASTM D2270 117 112

Health and Safety

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


It cannot be guaranteed that the product information given above is up to date. For the latest version of the Product Data Sheet we refer to the product library of ExxonMobil.