1.1本试验方法涵盖了利用热氧化发动机油模拟试验（TEOST）确定汽车发动机油形成的沉积物量的程序。实验室间研究已确定其适用于总沉积量为10至65 mg的范围。 注1:试验方法的运行经验表明，该试验方法适用于总沉积量在2至180 mg范围内的发动机机油。 1.2以国际单位制表示的数值应视为标准。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 该测试方法旨在预测发动机机油的高温沉积物形成趋势。该测试方法可用于筛选油样或作为质量保证工具。 图1热氧化发动机油模拟试验（TEOST）

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 (TEOST). An interlaboratory study has determined it to be applicable over the range from 10 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 to 180 mg total deposits. 1.2 The values stated in SI units are to be regarded as the standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== The test method is designed to predict the high temperature deposit forming tendencies of an engine oil. This test method can be used to screen oil samples or as a quality assurance tool. FIG. 1 Thermo-oxidation Engine Oil Simulation Test (TEOST)