At the rotating speeds and temperatures that these bearings are put to, break down of the lubricant and viscosity aren't really concerns as to the life of the bearing. The viscosity, however, will affect the damping of the sound of the bearing. Any oil, even grease, will work to protect the bearing, but they might sound differently, depending on their viscosity.
I second the synthetic oil (5W30) recommendation as a good "forget about it" oil to be used in turntable bearings.
Bob P.
I second the synthetic oil (5W30) recommendation as a good "forget about it" oil to be used in turntable bearings.
Bob P.