Several major U.S. engine manufacturers recently revised their factory-fill and service-fill engine oil specifications after experiencing a number of engine failures related to low-temperature oil pumpability. Changes include lower limits on ASTM D97 pour point and adoption of stable pour point requirements as measured under cyclic low-temperature conditions. Factors such as base stock, VI improver, pour point depressant and detergent-inhibitor package selection can have a pronounced effect on a fully formulated engine oil's low-temperature flow properties. It has been found that by a judicious combination of HVI and MVI base stocks, one can formulate multigrade engine oils with excellent low-temperature flow properties. Properly formulated oils can readily meet all of the current factory-fill and service-fill specifications, and are expected to minimize the possibility of any future low-temperature oil pump-ability related field problems.


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    Titel :

    Low-Temperature Rheology of Multigrade Engine Oils - Formulary Effects


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    1983 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1983



    Erscheinungsdatum :

    1983-10-31




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Low-Temperature Rheology of Multigrade Engine Oils - Formulary Effects

    Clevenger,J.E. / Richards,H.F. / Shell,US | Kraftfahrwesen | 1983


    MULTIGRADE OILS

    MOXEY, JOHN G. | SAE Technical Papers | 1955



    Multigrade oils

    Moxey, Jr., J.G. | Engineering Index Backfile | 1955


    Pumpability of Multigrade Engine Oils at Low Temperature

    Graham, J. P. / Smith,, M. F. | SAE Technical Papers | 1971