Gear Lubricants
Product Data
castrol.com/GPS
800 255 4417
May 2025
GPS
Castrol
®
AP Gear Lubricant
Typical Analysis
Test Method Typical Results
Kinematic Viscosity at 40° C, cSt ASTM D445 326
Kinematic Viscosity at 100° C, cSt ASTM D445 31.6
Viscosity Index ASTM D2270 135
Flash Point, °C (°F) ASTM D92 240(464)
Pour Point, °C (°F) ASTM D97 -27(-17)
Brookfield Viscosity, -20°C, cP ASTM D2983 44,600
20 Hr KRL Shear Test Aer Shear cSt @ 100°C CEC-L45-20 31.4
% Viscosity Loss -0.66
FZG Gear Scuffing, Pass Load Stage ASTM D5182 12
FZG Gear Wear, mg wt Loss ASTM D4998 13
Gravity, API ASTM D287 31.4
Pounds per Gallon ASTM D287 7.23
Specific Gravity @60F, g/ml ASTM D1298 0.8679
E20
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