Mobilgard™ 525

ExxonMobil marine , Albania

Diesel Engine Cylinder Oil

Product Description

Mobilgard™ 525 is a marine diesel engine cylinder oil for crosshead engines running low and ultra low sulphur distillate fuels and meets the requirements of MAN and Wartsila engines. Designed to protect in extreme environments, Mobilgard 525 has an optimum viscosity of 20 cSt at 100ºC and low volatility to ensure lubricant distribution and oil film retention and help protect engine parts.



     •  Combats the deposits and scuffing related engine wear associated wth low sulphur fuels

     •  Excellent thermal and oxidative stability to ensure performance in a variety of engine conditions

     •  Formulated with detergent technology required to deliver excellent performance with low-sulphur fuel

     •  Detergency system provides strong control of piston groove deposits which is a critical area for distillate fuel operation

     •  Marine crosshead engines designed for increased power and fuel efficiency

     •  Earlier engine designs and engines in slow speed steaming operation


Specifications and Approvals

This product meets or exceeds the requirements of:

Winterthur Gas and Diesel Engine (Heritage Wartsila & Sulzer) 2-Stroke engines according to manufacturer's latest operating guidelines


Properties and Specifications




SAE 50

Flash Point, °C, ASTM D92


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


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


Pour Point, °C, ASTM D97


Specific Gravity, 15 C/15 C, ASTM D4052


Total Base Number, mgKOH/g, ASTM D2896


Viscosity Index, ASTM D2270



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 Marine Limited
Ermyn Way
Leatherhead, Surrey
United Kingdom KT22 8UX

Due to continual product research and development, the information contained herein is subject to change without notification.  
Typical Properties may vary slightly.