STP621_S1

    The Relationship of Journal Bearing Wear to Multigrade Engine Oil Viscometric Properties

    Published: Jan 1977


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    Abstract

    A high speed road test procedure was developed to demonstrate performance of multigrade engine oils in journal bearing wear protection. High shear viscosities of test oils were approximated through use of a pump loop. A reasonable first approximation of critical viscosity for bearing failure is estimated by measurements at 149°C and about 5×105 sec -1 with the pass/fail limit being about 3.5 cSt.


    Author Information:

    Stambaugh, RL
    Rohm and Haas Co.,

    Kopko, RJ
    Rohm and Haas Co.,

    Bennett, PA
    Rohm and Haas Co.,


    Paper ID: STP32377S

    Committee/Subcommittee: D02

    DOI: 10.1520/STP32377S


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