TRUEGARD HD 85W/90 5 GALLON PAIL

The 85W/90 designation is an SAE multi-grade classification: "85W" describes the oil's cold-temperature flow characteristics (the "W" stands for winter), while "90" defines the high-temperature viscosity. This grade is typically specified for heavy-duty manual transmissions, axles, and differentials, so always verify your equipment manufacturer's gear oil viscosity recommendation before purchasing.

"HD" stands for Heavy Duty, indicating the oil is formulated to handle the demanding loads and operating conditions found in commercial or industrial drivetrain components rather than light-duty passenger-vehicle applications.

A 5-gallon pail is well suited for fleet operators, shops, or facilities that perform multiple gear oil services regularly, as it reduces per-unit cost compared to smaller containers. If you only need to service one or two components infrequently, a smaller package size may result in less waste.

As a best practice, drain and flush the old fluid before adding new gear oil, rather than topping off with a different product. Mixing gear oils of different formulations can compromise performance and is generally not recommended unless the manufacturer explicitly permits it.