Hydraulic Fluids
Product Data
castrol.com/GPS
800 255 4417
May 2025
GPS
Castrol
®
Blue Hydraulic Plus
™
Industry Test Results
All test results are for Castrol Blue Hydraulic Plus ISO 32.
Denison T6H2OC Pump Test
Castrol Blue Hydraulic Plus passed under Denison HF-O requirements.
Denison T6-C Pump Test
Castrol Blue Hydraulic Plus passed under Denison HF-O requirements.
Denison T5D42 Vane Pump Test
Castrol Blue Hydraulic Plus passed under Denison HF-O requirements.
Denison P-46 Piston Pump Test
Castrol Blue Hydraulic Plus passed under Denison HF-O requirements.
Vickers 35VQ25 Vane Pump Test
With an allowable total weight loss for ring and vane at 90 Mg, Castrol Blue Hydraulic Plus exceeded the test
limits with total weight loss of 23.3 Mg.
Turbine Oil Rust Prevention Test (ASTM D 665)
Using distilled water (D 665A), Castrol Blue Hydraulic Plus passed this test under both Cincinnati Milacron and
Denison HF-O requirements. Using synthetic sea water (D 665B), Castrol Blue Hydraulic Plus passed under
Denison HF-O requirements. ere is no requirement for Cincinnati Milacron.
Foam Inhibition (ASTM D892)
Castrol Blue Hydraulic Plus le no foam aer this 10 minute test.
Filterability (Denison TP 02100)
Castrol Blue Hydraulic Plus filtered in 150 seconds when dry and only 220 when contaminated with 2% water.
e limit was 600 seconds dry and 2 times the dry figure when wet.
Hydrolytic Stability (ASTM D 2619)
C20
Wet Filterability
(per Denison HF-O Filter Test)
Dry
Wet
Wet Filtration Time (seconds)
ecastrof
