Just to reiterate, since there seems to be some confusion; the white lithium grease is down in the motor assembly, where the plastic toothed cable which extends and retracts the antenna coils up upon retraction, and uncoils upon extension.
You wouldn't want to smear grease on the exposed (extended) metal mast sections. That would make a mess.
For me, just some WD-40 on a rag to occasionally wipe off any accumulated dirt, keeps it working smoothly.
My first mast from the factory lasted 12 years, the second OEM mast which I installed myself, is still smooth as can be, and should last at least as long as the original.
I dislike having an antenna mast sticking up constantly, or I might have done the often mentioned Tacoma whip mod.