Test severity, inhibition and oil discrepancy: these are factors which influence the formation of sludge and the extent of its settling in the engine. By appropriate used-oil analyses it is possible to calculate indices of the oil's performance which are largely independent of the type of engine used and test procedure followed. The ASTM D 893 test procedure is inapplicable to a large number of modern motor oils. An alternative method based on the filtration of used oils over membrane filters has been of great help in recent years. However, a newly developed photometric method seems promising in overcoming most present analytical difficulties. The indices obtained from used-oil analyses can become the only feasible test method in the development of long drain oils. (DePo)
Evaluation of dispersancy by analytical methods
Bewertung des Dispersionsvermoegens von Motoroelen durch analytische Verfahren
SAE Papers. Cumulative Index ; 780932 ; 1-11
1978
11 Seiten, 20 Bilder, 4 Tabellen, 5 Quellen
Conference paper
English
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