A NEW TESTING METHOD FOR CIRCULATING LUBRICATING OILS (Ein neues Profverfahren fur Umlaufole)

摘要

The methods heretofore used for judging circulating lubricating oils, particularly those based on the neutralization and saponification numbers, furnish no constant factor concerning the aging state of the oils utilized. Conversely by artificial aging and determination of the content consisting of resinous and asphaltous precipitations in conjunction with the values of the neutralization and saponification numbers an aging factor can be computed which gives information concerning the further usability of the oil in question. The new testing method has been subjected to trials and tests, using many samples of turbine and motor oils.