Mobilect™ 36

Mobil industrial , Chile

Electrical insulating oils

Product Description

Mobilect™ 36 is a mineral uninhibited insulating oil with dielectric properties and oxidation stability intended for transformers, switchgears and other electrical equipment. Mobilect 36 meets ASTM D3487, Type I.


Features and Benefits

Mobilect has resistance to thermal and chemical degradation in the presence of iron and copper, which reduces tendencies to produce sludge

and oil-soluble oxidation products. When lower quality oils are used these may form deposits in the transformer and impede heat transfer by interfering with convection currents. In addition deposits may accelerate insulation defects and are often very difficult to remove without complete dismantling.

•  The dielectric strength of Mobilect is a measure of the resistance of the oil to electric stress and is expressed in kV across a specified gap under test conditions. This is not a measure of the quality of the oil but of the absence of contaminants - especially moisture, fibres and polar chemicals.

•  Mobilect is free from wax even at low temperatures and thus circulates freely in outdoor applications. Its viscosity ensures readily heat transfer by mobile convection currents. Mobility is also essential to quick quenching of arcs in switchgear units.

•  The low pour point of Mobilect ensures a free flow in most conditions between the transformer and the conservator and maintains the reliability of tap changers at the lowest temperatures.



Mobilect is recommended for use in oil filled transformers and witch gears in which the oil is required as an insulation medium or as a heat transfer medium.


Specifications and Approvals

This product meets or exceeds the requirements of:

ASTM D3487, Type I


Properties and Specifications



Interfacial Tension, 25 C, mN/m, ASTM D971


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


Oxidation Stability @ 164 hr - Acid Number C, mgKOH/g, ASTM D2440


Breakdown Voltage, kV, ASTM D877


Density @ 15 C, kg/l, ASTM D4052


Pour Point, °C, ASTM D97


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



Health and safety

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

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Isidora Goyenechea 2915, Las Condes, Santiago Chile

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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