[maple_leaf_eh]

Fascinating conversation of by-the-book, use of the gray-haired archives, parallel job experience, similar actual experience, and mechanical curiosity.

(I am no expert, so please do not take my word.) I would think that if the biggest internal concern is the rings seizing against hard RR cylinder sleeves, then putting a barrier layer in there should be an important effort. Intuitively, I like the idea of pulling the spark plugs, adding machine oil directly, and deliberately turning the engine over would add that layer.

Batteries can be charged, changed and removed. Fluids pour and drain by gravity. Grease squirts in under pressure. Auxiliaries can be literally walked up to and problems addressed. Transmissions are oily by nature. Clutches though are always deep inside the hull, so whatever you do is better than nothing.

For what it's worth, I support dry storage versus outdoor storage. However, I had an unusual encounter with condensation on my M38A1 when there was a humidity pocket inside the shelter one late winter day. The water droplets formed on the vehicle could be wiped off like rain. I opened up the doors and turned on blower fans to move the moist air away as best I could.

In my other experience, if at all possible, heated indoor storage with batteries on tenders, and some form of monthly run-up cycle would seem like the best possible preservation. As I learned from a physiotherapist, muscles are made to move. Extend that to our hobby, ships are not built to stay in harbour.