The Measurement of the Viscosity Stability of Multigrade Engine Oils and Its Effect on Performance 700668

It is shown that the measurement of the viscosity stability of multigrade engine oils containing different VI improvers is dependent upon the shearing action of the test instrument. Mechanical rather than cavitational stresses must be used to obtain an accurate prediction of field performance. Car make as well as average engine speed influence the equilibrium viscosity of the used oil. The effect of shear stability on other performance characteristics of the multigrade oil are described in this paper.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 40% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.