Care and feeding of 3 rail AC engines, when to oil and when to grease

[jefelectric]

Just one point, don't use oil or grease on couplers.  Use the powdered lube for this job.

[eZAK]

Grease for gears only.

Light weight oil for all other non-electrical friction points.

Electronic cleaner for all elect contact parts.

[cruikshank]

Tonight we tried some engines that have been in storage for at least 8 years, some never ran.  Dry as a bone, sounded like a bucket of bolts.  Talking Lionel cheaper F3 units with both trucks driven.  Have a Lionel Oil kit, and PTE or something similar non plastic attacking white grease.  I know to use sparingly.  When do you use oil, and when do you use grease?  Also any other maintenance tips would be appreciated.  Thanks,  Dave