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https://oil-glup.ru/threads/noack-ego-v-kachel.69/#post-811
A technical text excerpt explains that West German oil evaporation is measured by the Noack test at 250 °C per DIN 51581, noting no direct correlation with ASTM D 972 tests run at lower temperatures. Table 6 compares lubricant properties across solvent refined, hydrocrack dewaxed, polyolefin, and diester oils detailing viscosity, evaporation losses, pour points, hydrolysis, and perbunane swelling.