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Viscosity Modifiers (VM's) are commonly sold as polymer in oil concentrates. Thus, the handling (pumpability and mixability) characteristics of these systems are important practical considerations. These VM's normally are characterized only by kinematic viscosity, although they are handled at a range of shear rates/stresses which kinematic viscosity does not describe. New polymer types and structures and the desire to make the modifier level as high as possible requires more than a single point kinematic viscosity measurement. The rheological behavior of the concentrate is required to make economical systems that can be handled in a practical manner. This paper represents an initial study of viscosity modifier concentrates by rheological techniques.