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-90 is a multi-grade gear lubricant where '80W' describes its low-temperature flow performance and '90' describes its viscosity at operating temperature. This grade is a standard specification for manual transmissions, differentials, and drive axles — always verify your equipment manufacturer's viscosity requirement before use.

  • HD' stands for Heavy Duty, indicating the oil is formulated to handle demanding gear and drivetrain applications that involve high loads and sustained mechanical stress, as opposed to lighter-duty gear lubricant formulations.

  • The 'W' stands for Winter and refers to the oil's cold-temperature pumpability rating. A multi-grade 80W-90 performs across a wider temperature range than a single-weight 90-grade oil, making it more versatile in environments that experience significant temperature variation.

  • The 55-gallon drum is a bulk purchase format best suited for fleet maintenance operations, heavy equipment service facilities, or industrial sites that consume gear oil in large quantities on a regular basis, offering a lower cost-per-gallon compared to smaller containers.

Key Features

  • Multi-grade 80W-90 viscosity is a standard specification for manual transmissions, differentials, and drive axles, covering the most common gear and drivetrain applications.

  • HD (Heavy Duty) formulation is engineered to handle demanding gear and drivetrain applications involving high loads and sustained mechanical stress.

  • The 80W multi-grade rating delivers a wider operating temperature range than single-weight 90-grade gear oil, making it more versatile in environments with significant temperature variation.

  • Available in a 55-gallon drum format, offering a lower cost-per-gallon compared to smaller containers, making it well-suited for fleet maintenance operations, heavy equipment service facilities, and high-volume industrial sites.