This test method is used in a number of specifications.ĥ.2 Initially this test method was developed to determine whether an automatic transmission fluid (ATF) would meet OEM low temperature performance criterion originally defined using a particular model viscometer.6 The viscosity range covered in the original ATF performance correlation studies was from less than 1000 mPa Measurement of the viscometric properties of these oils and fluids at low temperatures is often used to specify their acceptance for service. ![]() 5.1 The low-temperature, low-shear-rate viscosity of automatic transmission fluids, gear oils, torque and tractor fluids, and industrial and automotive hydraulic oils (see Appendix X4) are of considerable importance to the proper operation of many mechanical devices.
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