1977-02-01

The Relationship of Journal Bearing Wear to Multigrade Engine Oil Viscometric Properties 770627

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 5Xl05 sec -1 with the pass/fail limit being about 3.5 cSt.

SAE MOBILUS

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