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Keller-Heartt has Truegard Propylene Glycol Heat Transfer Fluids in both Inhibited and Food Grade! Order Today!
Propylene Glycol Available. Order Today!

Frequently asked questions

Find answers to common questions about our products and services
  • 75W/90 is a multi-grade gear oil designation where '75W' indicates its cold-weather flow performance and '90' refers to its high-temperature viscosity. This grade is commonly used in manual transmissions, differentials, and axles where a medium-weight gear lubricant is required by the OEM.

  • A 55-gallon drum is best suited for fleet operations, service shops, or industrial facilities that perform frequent gear oil changes across multiple vehicles or pieces of equipment, as bulk packaging reduces per-unit cost and minimizes packaging waste compared to purchasing individual quarts or gallons.

  • Drums should be stored indoors or under cover in a cool, dry area away from direct sunlight and extreme temperature swings. Drums stored on their side should be rotated so the bung is at the 3 or 9 o'clock position to prevent moisture ingress through the seal.