When I receive a new locomotive I send it to the Munoz Lines repair shop for initial maintenance. The Lionel manual calls for oiling all the appropriate spots on the running gear, axles, and rollers that need librication. It said nothing about periodic grease even though the two screws labeled "grease" are clearly intended for that purpose. Upon taking out the screws I found no evidence of lubrication. I greased them up.
Scrappy