I have a BendPak XPR-10ACX 2 post lift
I did a search and didn’t find too much
(eg, http://www.garagejournal.com/forum/showthread.php?t=23836 and http://www.garagejournal.com/forum/showthread.php?t=12549)
It seems as if it would be fine to lubricate the inside of the columns with lithium...