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Gear oil is made up of two components:
Base oil and additives.additives impart desirable properties and suppress undesirable ones. The additive package is the bare bone of the lubricant’s performance, and a strong backbone will provide the performance and protection you need. When selecting gear oil.
there are three essential attributes to consider:
The gear oil must remain thermally stable and not oxidize at high temperatures, this avoiding the creation of sludge or vanish. Keeping the oil from oxidizing will lengthen drain and replacement intervals. As a general rule of thumb, for every 18 degrees F (10 degrees C) increase in fluid temperature above 140 F(60 C), oxidation will reduce the service life of a lubricant by half.
If you have an enclosed gearbox application that is heavily loaded or subject to shock loading, you need gear oil with extreme pressure properties. Gear oil with an EP additive will protect the gear surfaces against extreme pressures.
Gear oil must fight contamination that enters the system, especially water. The oil must be able to demulsify, which allows for easy removal of the water from the gearbox.
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