GEAR OIL GL-5 140 EP 4L

GEAR OIL GL-5 140 EP 4L refers to a highly specialized automotive or industrial lubricant, and its designation breaks down as follows:

GEAR OIL: Indicates its primary use in gearboxes, differentials, and other gear-driven components.

GL-5 (API Service Classification): This is the most critical part of the specification.

It designates a lubricant suitable for severe service involving high-speed, shock loads, and high-speed/low-torque or low-speed/high-torque conditions.

It contains a high level of Extreme Pressure (EP) additives, primarily sulfur-phosphorus compounds, to protect Hypoid Gears—the type found in nearly all modern automotive differentials (rear axles, final drives).