A disc drive storage system including a housing having a central axis, a stationary
member that is fixed with respect to the housing and coaxial with the central axis,
and a rotatable member that is rotatable about the central axis with respect to
the stationary member. A hydro bearing interconnects the stationary member and
the rotatable member and includes a lubricating fluid having a base fluid and an
additive and/or a combination of additives or base fluids for reducing the temperature
dependency of the viscosity of the lubricating fluid.