When i need my ramp for other car i have to move my S2,i would run it until fan cuts in 2 times as this is considered normal operating temperatures .

 

Get a battery tender, you said it's in storage, I don't drive mine during winter months as much due to rain, the tender I use it's the ctek mxs 5.0

 

IMO, only reason manual says to start it during storage is to keep battery charged. Lawyers wouldn't let them say hook up battery tender type device, because some idiot would screw it up, battery acid in face and lawsuit.

Use a battery tender, don't be an idiot and get acid in face, and never, ever start a car during storage. Its not good for the engine At. All.