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Apache Oil Company is a leading distributor of transformer oil for a wide variety of uses. Call us for quotes!


Conoco® Phillips Transformer Oil is a highly refined electrical insulating oil developed for use in oil-immersed transformers, capacitors, tap changers and circuit breakers where the equipment manufacturer specifies a Type II inhibited oil meeting ANSI/ASTM D3487-09 requirements.

Transformer Oil is formulated with hydrotreated naphthenic base oils and an oxidation inhibitor to control sludge and deposit formation and provide extended service life compared with non-inhibited Type I transformer oils. It has a high dielectric strength and low power factor to provide excellent insulating properties. It has excellent low-temperature properties and is noncorrosive to copper and copper alloys. This product does not contain any PCBs.


  • Oil-immersed transformers
  • Circuit breakers
  • Fuses
  • Switches
  • Tap changers
  • Oil-immersed electrical equipment

Transformer Oil Specifications

Conoco® Phillips Transformer Oil meets the requirements of the following industry and OEM specifications:

  • ANSI/ASTM D3487-09 Type II Inhibited Oil
  • British Standard BS 148, Class 1A
  • Federal VV-I-530A, Class II Specification
  • GE A13A3A2 (10CA)
  • IEEE
  • International Standard IEC 60296
  • NEMA Type II (obsolete)
  • Westinghouse Specification PDS 55822AG

Features and Benefits

  • Excellent insulating properties
  • High dielectric strength(1)
  • Low power factor
  • Resists oxidation and deposit formation
  • Excellent low-temperature properties
  • Compatible with materials used in transformers


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