I'm looking to store an N54 powered 135i for up to 2 years, it will not be insured so the most I can do is pretty much drive it up and down my driveway. I planned to start the car every two weeks and let it get up to temp and just kind of roll it up and down the driveway. Wiil this be sufficient? Additionally, I was looking at using some fuel stabilizer. Though I am not sure if that is an issue for the Piezo direct injectors on the N54 motor. Ideally I'd be able to insure it and just drive it, but due to some unforseen circumstances I just cannot afford another car on my insurance plan.