Jason
In an of the information I've read HWH , RVA and others all recommend using WD40 to lube the jack rams .
Wild down any dust or dirt before spraying the rams with WD40 then spray the seal area and ram well and when done run the jacks up and down a few times before wild them down again to remove the rest of the WD40 so that dust and dirt don't collect on the rams.
Hope this helps
Eric