Another reasonable source of info and product: polyurethane lube

One other site has some shaky info when it says something along the lines of; "...don't use a petroleum based grease, use a lithium based grease................" Whoever wrote that, if they said what they mean/know, doesn't know anything about grease. Probably 99% of the lithium "based" greases have petroleum derived oils in them, the oil is the lube, the lithium the thickener (which has virtually no lubricating function).