Mobil Delvac Ultra™ 5W-40 Ultimate Defense

Mobil commercial-vehicle-lube , Poland

Ultra-High Performance Diesel Engine Oil

Product Description

Mobil Delvac Ultra 5W-40 Ultimate Defense is an advanced synthetic technology ultra high performance diesel engine oil that provides excellent lubrication including long drain capability, helping towards long engine life for diesel engines operating in severe applications. The advanced technology behind this product delivers exceptional performance in turbo-charged as well as older naturally aspirated engines. Mobil Delvac Ultra 5W-40 Ultimate Defense is recommended for use in a wide range of heavy-duty applications and operating environments found in trucking, mining, construction, agriculture and marine.


Features and Benefits

Modern high output diesel engines run hotter than older engines which significantly increases the demands on engine lubricants. Current tighter engine designs reduce oil consumption, resulting in less fresh oil makeup to replenish depleted additives. Top piston rings are located higher bringing the oil film closer to the combustion chamber where temperatures increase thermal stress on the lubricant. Mobil Delvac Ultra 5W-40 Ultimate Defense helps to protect the engine under severe operating conditions. It is also fully compatible with conventional mineral oils. The key benefits include:



Advantages and Potential Benefits

Excellent thermal and oxidation stability

Control of low temperature sludge build-up and high temperature varnish deposits

High TBN

Helps towards extended drain intervals with high Sulphur fuels

Advanced formulation and viscometrics

Maintains viscosity in severe, high temperature service

Excellent low temperature pumpability

Easier engine start-up and reduced wear

Good resistance to corrosion

Helps towards long life of critical wear surfaces

Long drain capability

Helps towards good operating efficiency and lower overall cost

Component compatibility

Long gasket and seal life, extended service intervals

Low volatility, excellent wear and bore polishing control

Good oil consumption control



* Mobil Delvac Ultra 5W-40 Ultimate Defense is recommended for use in super high performance diesel applications including turbo-charged and naturally aspirated engines designs

* On-highway engines operating in both high speed/high load and short haul pick-up/delivery; off-highway and marine engines operating in severe low speed/heavy load conditions

* Diesel powered equipment from European builders


Specifications and Approvals


This product has the following approvals:



MTU Oil Category 3

MAN M 3277

MB-Approval 228.5

MAN M 3377

Mack EO-N

DTFR 15B120

Cummins CES 20077

Cummins CES 20078


This product is recommended for use in applications requiring:




This product meets or exceeds the requirements of:







Caterpillar ECF-2

Cummins CES 20076

ISUZU DEO (w/o DPD Equipped Vehicles)


Properties and Specifications




SAE 5W-40

Density @ 15.6 C, g/ml, ASTM D1298


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


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


Total Base Number, mgKOH/g, ASTM D4739


Ash, Sulfated, mass%, ASTM D874


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


Viscosity Index, ASTM D2270


Pour Point, °C, ASTM D97



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 Europe, division of ExxonMobil Petroleum & Chemicals BV. 
This information relates only to products supplied in Europe (including Turkey) and the Former Soviet Union.

ExxonMobil Poland Sp. zo.o.
Al. Jerozolimskie 98
00-807 Warszawa

You can always contact our Technical Help Desk engineers on Mobil lubricants and services related questions:

Tel +48 22 556 29 00
Fax +48 22 620 16 61

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
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