Pennzoil® Gearplus® SAE 80W-90 Gear Oil is a specially formulated gear oil designed to withstand the demands of today’s stop-and-go driving. Recommended by Pennzoil for use in hypoid or spiral bevel gear differentials and industrial gear units where API Service GL-5 and SAE 80W or 80W-90 viscosity grades are specified. Gearplus® SAE 80W-90 Gear Oil is especially suited for limited-slip differentials as makeup or refill fluid, and is an excellent replacement fluid for rebuilt limited-slip differentials.