Recommended lubrication?

In general, STD is no different than other gauges i.e. lightly grease all the gears, oil all the usual surfaces. Most people like Red and Tacky #2, but for your occasional light use, any convenient grease is probably fine. You may also want lightly oil the axles of your cars.

Todd, I have o gauge MTH tinplate that I use in a similar fashion. Ubertstionmeister’s advice is spot on. The only thing I would add is that after 7 years, I would also lightly grease the worm gear as well.  Pull out your instruction manuals for your particular models and it will walk you through how to do this. It will usually entail dropping The truck or lifting up he can motor.  I do that every five years with red and tacky #2. When I first started doing this, I was shocked at how dry my lightly run engine worm gear had become. 

Sounds good. Thanks!