These Standards describe a test on properties preventing oxidation and corrosion of metals. the apparatus is eight place assembly for testing the oxidation characteristics of filtered middle distillate fuels. The test apparatus is also used for steam turbine oils, extreme pressure lubricating oils, inhibited steam-turbine oils, hydraulic oils, etc. at elevated temperatures. Basically a 350 ml by volume of filtered middle distillate fuel is aged at 95oC (203oF) for 16 hours. The oxygen is bubbled through sample at a rate of 3 Lit/hour. The sample is then cooled to room temperature and filtered to obtain the filterable insolubles. The sum of the filterable and adherent insolublesfound after test is reported as total insolubles accordingly.