Gear Oil 80/90 Quart Bottle – GL80W-90

80W-90 gear oil carries the extreme-pressure additive package that protects gear teeth in drive axles, gearboxes, and differentials under the shock and sliding load of meshing gears. The 80W-90 grade holds film strength between loaded gear faces at operating temperature while staying fluid enough to circulate when the equipment is cold, so the gear set stays lubricated across the working range.

Running the correct grade keeps the gears protected through heat and load and slows the wear that later shows up as increased clearance and gear noise. Supplied in a quart bottle, it suits a top-off or a small-capacity fill rather than a full drain and refill. Match the grade and specification to what the axle or gearbox calls for, since a gear set is built around a specific oil viscosity.