Phillips 66® Transmission Oil SAE 90 is an SAE 90 mineral oil gear lubricant recommended for use in manual transmissions, transfer cases and rear axle assemblies of automotive, farm and off-highway equipment where the manufacturer specifies an API GL-1 gear oil. It also may be used in light-duty industrial applications where a non-compounded ISO VG 150 or AGMA 4 mineral oil is specified.

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Features & Benefits

  • Good film strength for wear protection
  • Good oxidation resistance
  • Protects against rust and corrosion
  • Good foam resistance


  • Heavy-duty, multiple-speed manual transmissions and transfer cases in trucks and buses where the manufacturer specifies an API GL-1, SAE 90 gear oil
  • Lightly loaded enclosed industrial gear drives where the OEM specifies a R&O type, AGMA 4 gear oil
  • General-purpose lubrication in applications that require a non-compounded, ISO VG 150 mineral oil

Technical Details

  • 90
  • Licenses & Approvals

    Mineral Gearlube 90 meets the requirements of:#API Service GL-1

    Additional Details

    SAE 90
    ISO 150
    AGMA 4
    Specific Gravity @ 60°F 0.875
    Density, lbs/gal @ 60°F 7.28
    Color, ASTM D1500 2.5
    Flash Point (COC), °C (°F) 277 (531)
    Pour Point, °C (°F) -17 (1)
    Viscosity 34.0
    cSt @ 40°C 155
    cSt @ 100°C 15.5
    SUS @ 100°F 813
    SUS @ 210°F 81.8
    Viscosity Index 101
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