New lubricants providing both extremely high viscosity index (VI) and improved boundary/mixed lubrication performanceare investigated. Comparisons are made in both laboratory scale testing using typical journal bearing slidingsurfaces (steel and white metal) and full scale testing using a hydrodynamic journal bearing test machine. The resultsfrom these studies demonstrate the effectiveness of new, high VI, turbine oils at reducing friction at machine startupand improving performance during steady state operation.