[Amps] Dielectric grease for roller inductors ?

[Jim Thomson]

What are you folks using for grease, if any on roller inductors ?   I have both a RI-50..which has this green grease on it, when purchased new,
and also a RI-40... which has no grease on it. 

Both rollers  use  .375  silver plated, edge wound ribbon for the inductor... and  .072 thick.   A pair of gold plated contacts pinch each side of the  
edge wound ribbon. 

Will plane jane automotive type  dielectric grease work for this application ?   Or should I use something more exotic like Dow corning DC-4  or  DC-5 ? 
Without any lubricant on there at all, they are just metal on metal..which I fear will  just eventually destroy the  silver plated ribbon..and the
gold plated contacts.   

Jim  VE7RF