If you listen to what Peggy Hall says, use Teflon-based thick grease 
(SuperLube). Don’t put it into the bowl; rather, unscrew the  pump and put it 
there from the back end. It should last a year  or so.

Any oil in your holding tank would only create clogs.

Compare e.g. this: 
https://forums.sailboatowners.com/index.php?threads/peggy-using-canola-oil-in-marine-toilet.187676/#post-1402530

Marek

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Fred Hazzard 
via CnC-List
Sent: Thursday, September 28, 2017 18:25
To: cnc-list@cnc-list.com
Cc: Fred Hazzard <fshazz...@gmail.com>
Subject: Stus-List Toilet lubrecation

What are listers using to keep their toilets pumping freely?   The manufacturer 
sells something, but suspect there is a generic cheaper alternative.  I've used 
vegetable oil in the past, but that seems gum up the pump.  A friend uses motor 
oil but I worry about it not being compatible with the rubber parts.

Fred Hazzard
S/V Fury
C&C 44
Portland, Or
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