The chemical composition resists oxidation and thermal breakdown, ensuring the lubricant maintains its viscosity and protective qualities over extended service intervals. It contains a balanced additive system that offers less extreme pressure protection compared to its GL-5 counterpart, making it suitable for applications where sliding speeds are lower.
Understanding Drain Intervals for GL-4 Gear Oil
Prevents scoring and surface fatigue on critical components. GL-5 formulations contain higher levels of sulfur and phosphorus compounds designed to handle high sliding speeds and shock loads typical in modern hypoid gears.
The defining characteristic of a GL-4 lubricant is its ability to provide adequate protection against pitting and scuffing under moderate shock loads and sliding conditions. These additives, while effective, can sometimes corrode yellow metals found in brass synchronizers, which is why GL-5 is not recommended for manual transmissions.
Understanding Drain Interval for GL-4 Gear Oil
Technical Definition and Performance Criteria The designation GL-4 refers to a performance classification established by the American Petroleum Institute (API) for gear oils used in hypoid bevel gear drives. Offers excellent water resistance to prevent emulsification.
More About Gl-4 gear oil
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