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1.1 ,This test method covers the procedure to determine the amount of deposits formed by automotive engine oils utilizing the thermo-oxidation engine oil simulation test (TEOST2).3 An interlaboratory study (see Section 17) has determined it to be applicable over the range from 10 ,mg to 65 ,mg total deposits.
Note 1: ,Operational experience with the test method has shown the test method to be applicable to engine oils having deposits over the range from 2 ,mg to 180 ,mg total deposits.