Speedometer cable lube

[Kestas]

I have the speedometer out of my car and the cable is just sitting there. I thought now would be a good time to do some preventive maintenance and refresh the lube after 22 years service.

What is the specified lube for the cable? I don't see it in the approved products list. Searching on this site and others yields a plethora of suggestions, including graphite lube, wheel bearing grease, and others. In the old days for other makes it was stated to only use a graphite lube.