I use Jagwire Lex shift housing. It has some sort of slick liner. At less than $1/foot, I cant imagine its the best they make. I havent ever lubed it.
For brake housing, I use generic Sunlite housing with a liner. Havent lubed that either.

Cables are simple stainless cables. Not the slick type.


Shifting is always quick and accurate. Braking is easy.

I have seen older unlined housing get the lube treatment before, but I havent ever seen the need for lined housing...at least what I have.