Hydraulic Fluids
Product Data
castrol.com/GPS
800 255 4417
May 2025
GPS
Castrol
®
Blue Hydraulic Plus
™
Typical Analysis
ISO Grade Method 32 46 68 100
Former Grade (Light) (10) (20) (30)
Viscosity @40°C, cSt ASTM D445 33.8 45.3 68.2 105.7
Viscosity @100°C, cSt ASTM D445 5.5 6.6 8.7 11.7
Viscosity @100° F, SUS ASTM D2161 160 215 319 551
Viscosity @210° F, SUS ASTM D2161 44 48 54 65
Viscosity Index ASTM D2270 103 103 105 102
Flash Point, °C (°F) ASTM D92 210 (411) 215 (420) 226 (440) 226
(440)
Pour Point, °C (°F) ASTM D97 -32 (-26) -26 (-15) -26 (-15) -15 (+5)
Oxidation Life, ASTM D943 6000+ 5000+ 5000+ 4000+
(Hours to TAN 2.0)
Gravity, API ASTM D287 34 32 29.5 28
Pounds per Gallon ASTM D287 7.12 7.21 7.32 7.39
Specific Gravity ASTM D-1298 0.857 0.863 0.879 0.88
@60F g/ml
C24
ecastrof
