1.1 ,This test method covers the procedure to determine the mass of deposit formed on a specially constructed test rod exposed to repetitive passage of 8.5 ,g of engine oil over the rod in a thin film under oxidative and catalytic conditions at 285 ,°,C. The range of applicability of the Moderately High Temperature Thermo-Oxidation Engine Test (TEOST MHT2) test method as derived from an interlaboratory study is approximately 10 ,mg to 100 ,mg. However, experience indicates that deposit values from 1 ,mg to 150 ,mg or greater may be obtained.