[Tim7139]

I got you, I'm sure those provide protection but probably not enough up around here.
IMHO you've got to have something with an air exchange system. The issue is that in mid/ late winter when you get major temp change drops at night, you get lots of condensation on metal, particularly metal in closed systems.....like inside engines, etc. the exchange systems, with fans purge moist air....keep air moving...pretty much crush corrosion on bare metal, fasteners, etc.
One of the principle reasons I started this was to see if anybody subscribes to the engine bump, valve spring relief thoughts, anybody ever have issues?