Best lube for grey tank and black tank valves

dcmac214 wrote:
Only valve that gets lubed is the toilet seal with coconut oil (why it's called oil is beyond me--it's a solid grease about the consistency & feel of Crisco). Have never put anything down any of the drains to lube any of the tank valves. Every year as part of winterizing & de-winterizing spray the valve open/shut rod guide tubes with silicone and work them a bit. Do the slides with silicone same time. Haven't had any problems yet.

the coconut oil I used was indeed an oil, sort of like any vegetable oil. don't know why it was different from yours.
bumpy