[jb92563]

The best way to keep that IMS bearing well lubricated and healthy is to drive the car vigorously and frequently.

Don't be afraid to hit the rev limiter now and then on upshifts.
No over revs on downshifts though as the rev limiter cannot protect your engine in that situation.

Do regular oil changes twice a year and/or every 5-10k miles.

Get a Magnetic Oil Drain Plug and inspect the Filter paper for magnetic ferrous metal particles that could indicate the beginning/advanced stages of a failure when the IMS ball bearing cage starts to disintegrate.

The statistics say about 6% of the engines with an IMS bearing will experience the failure during the cars lifespan and it seems that these are mostly the cars that have not seen frequent use or don't get much high reving.

The racers, Daily drivers etc don't seem to experience these failures at all.