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British Army Oils during the Cold War

From EverybodyWiki Bios & Wiki

The British Army on the Rhine, commonly known as B.A.O.R or just BAOR used common oils throughout the British Armed Forces.

The oils were given a designation that denoted the type of oil and it's viscosity. Below is a list of the designations.[1]

  • OMD = Oil Mineral Detergent
  • OM = Oil Mineral
  • OEP = Oil Extreme Pressure
  • OX = Oil Extra
  • OC = Oil Compound
  • XG = Grease
  • PX = Corrosion Preventative
  • AL = Fluids, White Spirit

The number that followed the designation denoted the viscosity. For example

  • OM33 = Oil Mineral 33
  • OMD75 = Oil Mineral Detergent 75



Oil Mineral Detergent oil is a heavy duty engine oil. It is a detergent oil and so was designed to remove the carbon from the combustion process. It went in brown and came out black with the carbon that it had picked up. In the 1960s the army used OMD110 which was a heavy detergent SAE30 (Military specification MIL 2104) That was changed in the 1970-1980s to OMD75 which was a first generation 10w/30. OMD 80 followed and then OMD90 as oils changed.[2]


Oil Mineral is used for hydraulics in construction plant. The most commonly used was OM33.[2]


Oil Extreme Pressure is an oil with extreme pressure additives thereby making it useful for gearboxes. OEP 220 was the most common and was used in gearboxes, fluid flywheels, steering boxes and fluid lubricated universal joints.


OX is the designation for fluids.

OX8 for example is used as brake and clutch fluid.

OX-24 as it is the oil used to lubricate their personal weapons and comes in their weapon cleaning kits.


OC stands for Oil Compounded and is used for final drives. It is a refined mineral oil blended with 6% unblown rape seed oil. [2]


XG is the designation for grease. XG279 being the general purpose grease for vehicles and artillery.


PX or Corrosion Preventives is the designation given to products that prevent corrosion. PX6 is used to for the preservation of torpedoes and other ordnance. PX7 is the gunk found on military battery terminals.


AL is the designation for fluids. AL11 is used for deicing windscreens. AL39 is used as anti-freeze in vehicle engines.


  2. 2.0 2.1 2.2 "British Lubrication Information".

British Army Oils during the Cold War[edit]

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