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Frequently asked questions

Find answers to common questions about our products and services

  • 80W/90 is an SAE multi-grade gear oil viscosity designation, where '80W' indicates the cold-flow performance (winter) and '90' indicates the high-temperature viscosity. This grade is commonly used in conventional differentials, manual transmissions, and transfer cases that specify an SAE 80W-90 lubricant — always verify your equipment manufacturer's recommendation before use.

  • The 'HD' designation indicates this is a heavy-duty formulated gear oil, designed to handle the higher loads and stress typical of commercial, agricultural, or fleet equipment rather than lighter-duty passenger-car applications.

  • Mixing compatibility with other brands of 80W-90 gear oil is not specified for this product. While mixing gear oils from different brands is generally not recommended due to potential additive incompatibility, it is best practice to fully drain and clean the system before switching to a new lubricant.

  • Store the opened pail in a cool, dry location away from direct sunlight, heat sources, and moisture. Keep the lid tightly sealed to prevent contamination and water ingress, which can degrade the lubricant's performance.

  • A 5-gallon pail is a cost-effective choice for fleet operators, shops, or equipment managers who perform regular differential or transmission services on multiple units, reducing per-unit cost and the number of containers to manage.

Key Features

  • SAE 80W/90 multi-grade viscosity designation provides cold-flow performance (80W) alongside high-temperature viscosity (90) for year-round gear protection.

  • Heavy-duty (HD) formulation engineered to handle the elevated loads and stress typical of commercial, agricultural, or fleet equipment.

  • Intended for use in conventional differentials, manual transmissions, and transfer cases that specify an SAE 80W-90 lubricant — always verify your equipment manufacturer's recommendation before use.

  • 5-gallon pail format reduces per-unit cost and the number of containers to manage, making it a practical choice for fleet operators, shops, or equipment managers servicing multiple units.

  • Store opened pails in a cool, dry location with the lid tightly sealed to prevent contamination and moisture ingress that can degrade lubricant performance.