Castrol Hypoy C Gear Oil

Castrol Hypoy C Gear Oil
Product Code: #5380424091

Product Description:

Castrol Hypoy C Gear Oil is a multi-grade gear lubricant that provides excellent performance in manual transmissions and heavy-duty truck systems. Exceeds API MT-1 lubricants for non-synchronized manual transmissions used in buses and heavy duty trucks as well as API Service GL-5 lubricant for extreme pressure conditions. Recommended for service fill of all limited slip differentials in passenger cars and light trucks calling for SAE 80W-90 and API Service GL-5 specifications. Recommended for applications calling for Ford ESP-M2C154-A and GM 9985290 and is Mack GO-H approved.


  • Exceeds API GL-5 and MT-1 performance specifications.
  • Engineered for passenger cars and light trucks operating under high-stress conditions.
  • Meets the service fill requirements of conventional and limited slip differentials.
  • Recommended for use in all ATVs and Scooters with separate transmissions that require an API GL-5 gear lubricant. Can be used in V-Twin and Dirt Bike transmissions.

Available in:

  • 1 Quart SAE 80W90 (#5380424091)
  • 5 Gallon SAE 80W90 (#5380524091)
  • 55 Gallon SAE 80W90 (#5385524091)
  • 1 Quart SAE 85W140 (#5380424141)
  • 5 Gallon SAE 85W140 (#5380524141)
  • 55 Gallon SAE 85W140 (#5385524141)

Grade 75W-90
API Service GL-5
Viscosity, cSt 100°C 17.5
Low Temp.(ºC) Brookfield Vis. cst., max 135,000 (-40)
Pour Point, ºC max -39
Flash Point, COC 390°F (198°C) min
Specific Gravity, 60°F 0.896
Pounds per Gallon 7.46