Gear oil
serves as a crucial lubricant, safeguarding transmissions, transfer cases, and
differentials in various machinery across automotive, metal cutting, mining,
wind turbine, and aerospace sectors. Comprising base oil and additives, its
additive package defines its performance. Notable characteristics include
viscosity, ensuring fluidity across temperature ranges, pressure resistance for
extreme conditions, stability against thermal and oxidative breakdown,
corrosion protection, and compatibility with seals.
The American Petroleum Institute (API) categorizes gear oils based on performance, with GL-4 and GL-5 being the most prevalent grades. GL-4 is typically suitable for most cars, offering adequate protection, while heavy-duty or high-performance vehicles often require the enhanced properties of GL-5 gear oil. Selecting the appropriate gear oil is critical to ensure optimal performance and longevity of machinery and automotive components.
