New measurements of the viscosity of a round-robin sample of Krytox GPL102 oil are presented in the temperature range (282 to 364) K and up to 20 MPa. The measurements were performed in a vibrating-wire instrument with an uncertainty of 2 % (at the 95 % confidence level). The Newtonian behavior of Krytox GPL102 oil was confirmed by examining the relationship between shear stress and strain. Finally, a scheme based on considerations of the hard-sphere theory of the liquid state was employed successfully to correlate all of the present measurements within 2.5 % (at the 95 % confidence level).