Which driven oil are you using? XP doesn't have a rust inhibitor additive in it. I would change to an oil that does have a rust inhibitor for storage over the winter. Don't quote me but I think the driven HR series and the driven GP oils have the necessary additives for storage.
I also recommend that you fog the motor. There is a new product called Foggit that looks like a good product to use. Something is better than nothing.
If you have methanol or ethanol you should drain and flush the fuel system with some race fuel. Not a terrible idea even if you are on pump gas.
