Steve,
many folks have had very good results with Mobil 1 Synthetic Motor oil.
(I've been told it's comparable to Labelle, but at a fraction the price)
As long as the lubricant is plastic compatible, it can be used.
Also I have also been told that a small amount (a dab) of white lithium grease can be used
to lubricate the gears.
Happy Rails!
Dave