Question: 

Do I need to use a lube disc with the Companion?

Answer: 

You do not need a lube disc when pulling your RV.  Using a lube disc is a matter of preference. While utilizing a lube disc is a much cleaner option, you can simply apply an automotive type chassis grease to the top plate of the hitch.  If you would prefer a greaseless option, we highly recommend our Amercan made graphite lube disc.  https://www.bwtrailerhitches.com/product/graphite-lube-plate