I've always used good 'ol Lubri-plate....(a white lithium based grease that was OEM)... and injected it into the cable housings with a needle applicator on my grease gun.
Michael
\'48 chev 2-ton boom truck (Boomer) '49 Chev 2-ton flat bed
'65 Chev 35ft school bus
'88 GMC 6500
'72 Superior 26ft class "A" coach
'50 Farmall "M"
'71 MGB GT
'68 Austin-Healey Sprite
'65 Austin-Healey Sprite
and various other odd British cars
and lots of old radios.....
Although we know what the speed of light is..... What I want to know is... How fast is the speed of DARK??