All brands should be fine, anything you can find at Wally World or the ubiquitous hardware store.
Aside from that, I purchased an assortment of plastic-safe hobby lubes some time back which I find indispensible.
Hob-E-Lube from Woodland Scenics, a manufacturer who produces wares for the model train enthusiasts.
They can also be purchased separately.
-Harq
ORIGINAL: tesujin
ceramic grease, so those ceramic grease that comes with the tank kit should be safe then. for white lithium grease, any specific brand ?