Red n Tacky by Lucas Oil available at Home Depot
...and Menards...and probably any automotive supply store.
Definitely the way to go!
Be sure to clean all the old 70-year 'grease' () off the gears, first. There's nothing of any value left in that old dried and caked crud.
...and have a Merry Christmas, Joyful Hanukah, and prosperous, healthy, Happy New Year running thoses trains!
KD