Посмотрим веселые картинки с двух тестов на маслах групп II, III и IV.
ASTM D2272 - was designed to monitor the oxidative stability of new and in-service turbine oils. In some cases, it can also be used to characterize hydraulic fluids, circulating fluids, and many other types of industrial lubricants. The test uses a steel pressure vessel where sample oil is initially pressurized to 90 psi with oxygen and thermally stressed to 150°C (300°F) in the presence of copper coil catalyst and water until a pressure drop of 25 psi or more is observed. The test temperature was chosen to promote measurable oil breakdown in a relatively short time. The test is more suitable for the
determination of remaining useful life of in-service turbine oils rather than the qualification of new oils

- ASTM D 2272 - Turbine Oil
- RBOT Base OIl.jpg (102.87 КБ) 1210 просмотров
Привет ПАО с высоким KV100 от гидрокряка, который делает легко и непринужденно это чудо масло у которого низкий NOACK и высокий FP
ASTM D 4742 - Thin-Film Oxidation Uptake test (TFOUT) was developed to monitor batch-to-batch variations in the oxidative stability of rerefined lubricating base oils. The test stresses a small amount of oil to 160°C (320°F) in a high-pressure reactor pressurized with oxygen along with a metal catalyst package, a fuel catalyst, and water
to partially simulate the high-temperature oxidation conditions in automotive combustion engines.

- ASTM D 4742 - Engine Oil
- TFOT Base OIl.jpg (106.16 КБ) 1210 просмотров
из работы 2002 года - The Influence of Chemical Structure on the Physical Properties and Antioxidant Response of Hydrocracked Base Stocks and Polyalphaolefins. V.J. Gatto, M.A. Grina, T.L. Tat and H.T. Ryan Ethyl Petroleum Additives, J. Synthetic Lubrication 19-1, April 2002. (19) 3 ISSN 0265-6582 - когда гидрокряк содержал порядка 97% насыщенных углеводородов...
Для справки некоторых камрадов - на дворе 2018 год, и та же самая PC в своей III группе дает уже 99,8% насыщенных углеводородов, а не 97% как в этой статье 16-ти летней давности...

-Мне скучно, бес.
-Что делать, Фауст? Таков вам положен предел.