Prestart oil prime of a long storage engine can save your bearings and bank account.
http://www.peachparts.com/shopforum/diesel-discussion/86683-prestart-oil-prime-long-storage-engine-can-save-your-bearings-bank-account.html#post565636

instalation of block heater/pre-oiler, etc
http://www.peachparts.com/shopforum/diesel-discussion/30691-instalation-block-heater-pre-oiler-etc.html#post166907

Would a pre-oiler lengthen engine life?
http://www.peachparts.com/shopforum/diesel-discussion/31847-would-pre-oiler-lengthen-engine-life.html#post174393

AutoEngine, Pre Oiler...
http://www.peachparts.com/shopforum/tech-help/160646-autoengine-pre-oiler.html#post1237783