Transmission Fluids
Product Data
castrol.com/GPS
800 255 4417
May 2025
GPS
Castrol
®
UTF
Industry Test Results
Water Tolerance Wear Test
e Water Tolerance Wear Test measures a fluid's ability to protect against corrosive wear when
contaminated with water. Castrol UTF, pitted against a competitive fluid during 0.4% and 1.0% water
contamination, showed that it guarded against wear four times better than the competitive fluid.
Castrol
UTF
Water Tolerance Test
Wear and Corrosion In Contaminated Fluids
600
500
400
300
200
100
0
0.4% Water
Extra
Margin
of
Safety
Competitive
Fluid
Weight
Loss
(mg)
1.0% Water
Castrol
UTF
Competitive
Fluid
Extra
Margin
of
Safety
Sunstrand Hydraulic Pump Performance Test
During the Sunstrand Hydraulic Pump Performance Test, a fluid is contaminated with water and the flow of
the fluid is then measured. e loss of flow from the pump is measured and reported in flow degradation and
is an indicator of how well the fluid would flow and protect when contaminated with water. Castrol UTF
showed only 0.6% flow rate degradation on a Sunstrand Piston Pump Model 22-2132. e maximum
allowable flow rate degradation is 10%.
0
2
4
6
8
10
0.6%
Maximum allowable
flow rate degradation
Margin
of
Safety
Sunstrand Model 22-2132
Variable Displacement
Piston Pump
(5,000 psi, 3,100 rpm,
180˚F. [82.2˚C] with
1.0% water contamination)
Sunstrand Hydraulic Pump
Performance
D23
-············
-···
-···
-···
-···
-···
-···
ecastrof
