Winter storage, i have never used oil in cylinders, but would be ok like others have done over the years,
but only use a small amount.
And i know this subject has been talk here for years, but i want to mention a thing i did for years while i lived in California, 10 years.
i had to store about ten cars back in New Zealand where i was born---Invercargill it is the most southern city in NZ, and coldest and wettest.
IF your your car is on a concrete garage floor , a real good thing to do is place ordinary cardboard under your classic, cardboard has a air cavity
between the layers and is a very good conductor and restricting the cold from coming up.
If your concrete is damp and from new never had a damp proof when made ,just lay some black polyurethane down first under cardboard,