I store my Crossfire (Pittsburgh area) for the winters. After the first year storage when I started it up it had a loud valve train noise ( I guess and I am a mechanic) on the right top side of the engine. One trip to the dealer and they said it was "normal" and that changing the oil more often than the maintenance computer said would cure the problem. I did change the oil (Mobil 1) and much to my amazement it was a bit better. Now two years later and after a summer/ warm weather overnight rest with 32k miles it is getting louder and last for a quite a while after start up. Sometimes you have to drive it before it goes away and sometimes for a few miles you can hear as you drive, even over the rear-end gear noise. Which is another "normal" sound.

As much as I like the car my lease is up in two months and I think I will let it go back. As particular as I am even if I could convince the dealer to replace the lifters, valves camshaft or what ever it needs I am not sure I would want the local minivan mechanic tearing in to a car I was going to keep. If it turned in to a bottom end rebuild like one of the members had to endure I very well have the "big one" over it.

Some of the new engines just are not designed / assembled very well. I have 2007 SS Trailblazer with the 6 litter Corvette engine and it sounds like crap when you first start it up. By contrast my '63 oldsmobile, '69 camaro, '74 GMC pick up and my son's '84 Mercedes with 250k the last 10 of which has been mostly on recycled veggie oil all sound great. Go figure. Best of luck to all.