Skip to Content
Keller-Heartt has Truegard Propylene Glycol Heat Transfer Fluids in both Inhibited and Food Grade! Order Today!
Propylene Glycol Available. Order Today!
Request a Quote B2B Account Program Government Sales Shipping Policy

Frequently asked questions

Find answers to common questions about our products and services

  • 80W/140 is an SAE gear lubricant viscosity grade where '80W' describes its low-temperature flow characteristics and '140' describes its high-temperature viscosity. This heavy-weight grade is engineered for use in heavy-duty manual transmissions, differentials, and axles that operate under high loads and require a thicker lubricating film for adequate protection.

  • HD stands for Heavy Duty, indicating the oil is formulated to withstand the elevated pressures, loads, and stresses found in demanding drivetrain applications — making it suitable for commercial, fleet, or industrial equipment rather than light-duty passenger vehicle use.

  • 80W/140 is a heavier, higher-viscosity gear oil than 75W-90 or 80W-90, providing a thicker lubricating film that is better suited for high-load, high-torque applications such as heavy truck rear axles and large differentials. Always refer to your equipment manufacturer's specification to confirm the correct SAE viscosity grade required.

  • A 55-gallon drum should be stored upright or on its side in a cool, dry, and well-ventilated area away from moisture and contaminants. Dispensing requires compatible pumping equipment, and the drum bung should remain sealed until use to prevent contamination.

  • A 55-gallon drum is a bulk format best suited for high-volume users such as commercial fleets, farms, heavy equipment shops, or industrial facilities that perform frequent fluid changes. If your consumption is lower, a smaller package size may reduce waste and simplify handling — check whether this product is offered in pails or quarts as well.

Key Features

  • SAE 80W/140 viscosity grade engineered for heavy-duty manual transmissions, differentials, and axles that operate under high loads requiring a thicker lubricating film.

  • Heavy Duty (HD) formulation designed to withstand elevated pressures, loads, and stresses found in demanding drivetrain applications.

  • Heavier, higher-viscosity gear oil than lighter grades such as 75W-90 or 80W-90, delivering a thicker lubricating film suited for high-load, high-torque applications including heavy truck rear axles and large differentials.

  • Intended for commercial, fleet, or industrial equipment use rather than light-duty passenger vehicle applications.

  • 55-gallon drum bulk format ideal for high-volume users such as commercial fleets, farms, heavy equipment shops, and industrial facilities performing frequent fluid changes.