"SH/T 0732-2004 Determination of the relationship between viscosity and temperature of lubricating oils at low temperature and low shear rate (temperature scanning method) " specifies the method for determining the apparent viscosity of engine oils at low temperature conditions. The standard requires that the specimen be cooled from -5 ° C to -40 ° C or to a temperature range with a viscosity exceeding 40000mPa · s at a rate of 1 ° C/h at a shear stress below 100Pa, and its apparent viscosity is continuously determined. The measurement results include viscosity, gel index and their corresponding temperature. This standard applies to evaluating the flow performance of engine oils at low temperature conditions, but does not apply to Miscellaneous petroleum products. Before using this standard, users should take appropriate safety and protection measures and refer to the latest version of the referenced documents to ensure the accuracy and Reliability of the test results.