Mobilfluid 125

Extra High Performance Power Transmission Fluid

Mobilfluid 125 is an extra high performance power transmission fluid that is formulated for use in hydrodynamic gears and hydraulic systems typically found in railroad, marine, construction, and industrial applications. It is formulated using high performance basestocks and advanced additives to deliver the precise performance required to transfer power responsively. Mobilfluid 125 is engineered to withstand the stresses of heavy-duty, low and high speed applications in a wide range of severe operating environments.


Equipment lubricant recommendations

Our Mobil™ Product Selector tool will help you identify lubricant(s) for your specific equipment.

Data sheets

Features and Benefits

The use of hydrodynamic gear systems and hydraulic control systems depends on high performance fluids to achieve consistent and responsive control and efficiency of the equipment. These systems operate under high pressures and temperatures that can cause deposits in control valves where precise control of torque converters and hydraulics takes place. The key benefits of Mobilfluid 125 include:



Advantages and Potential Benefits

Good wear protection

Extended component life, increased productivity, and lower maintenance costs

Effective resistance to thermal degradation and oxidation

Significant reduction in harmful lacquers, deposits, and sludge

Maintains power transfer and good control response

Extends oil service life

Good low temperature properties

Easy start-up and responsive hydraulic control

Effective rust and corrosion protection including long stoppages in wet or humid ambient conditions

Reduces wear with reliable equipment start-up and lower maintenance costs

Excellent air release properties eliminate foaming problems

Delivers optimal hydraulic response and power transfer

Maintains fluid film for improved lubrication

Compatible with seals and gasket materials used in these systems

Reduced fluid leakage, pressure losses, and contamination



Recommended by ExxonMobil for use in:

     •  Fluid couplings and drives, torque converters, and hydraulic control systems used in railroad, marine, construction, and industrial applications


Specifications and Approvals

This product has the following approvals:

Voith Turbo 120.00059010


Properties and Specifications



ISO 32

Density @ 15 C, g/cm3, 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


Viscosity Index, ASTM D2270



Health and safety

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