Gear Lubricants
Product Data
castrol.com/GPS
800 255 4417
May 2025
GPS
Castrol
®
Alphasyn T™
Typical Characteristics
Test Method Units 150 220 320 460
Density @ 15°C ASTM D4052 g/ml 0.87 0.87 0.87 0.87
Kinematic Visc. @40°C ASTM D445 mm2/s 150 220 320 460
Kinematic Visc. @ 100°C ASTM D445 mm2/s 17.8 23.9 31.7 41.8
Viscosity Index ASTM 2270 -- 131 135 138 141
Pour Point ASTM D97 °C/°F -42/-44 -42/-44 -30/-22 -30/-22
Flash Point, COC ASTM D92 °C/°F 271/520 277/531 282/540 285/545
Foam Seq I ASTM D892 mls/mls 10/0 10/0 10/0 20/0
Rust Test ASTM D665B -- Pass Pass Pass Pass
(24 hrs/synthetic
sea water)
FZG fail stage (A8.3/90) DIN 51354 -- 12 12 12 12
E18
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